Home / 1,091,947,991.40-1,637,921,987.10-724,615,972.20

Finding the Fourth Proportional to 1,091,947,991.40, 1,637,921,987.10 and 724,615,972.20

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Solution

The fourth proportional to 1,091,947,991.40, 1,637,921,987.10 and 724,615,972.20 is: 1,086,923,958.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091,947,991.40 : 1,637,921,987.10 = 724,615,972.20 : x
  2. Step 2: Convert to fraction form
    1,091,947,991.40/1,637,921,987.10 = 724,615,972.20/x
  3. Step 3: Cross multiply
    1,091,947,991.40x = 1,637,921,987.10 × 724,615,972.20
  4. Step 4: Simplify right side
    1,091,947,991.40x = 1,186,864,433,070,222,336
  5. Step 5: Solve for x
    x = 1,186,864,433,070,222,336/1,091,947,991.40
  6. Step 6: Final answer
    x = 1,086,923,958.30

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Half scale
Find fourth proportional to 2,183,895,982.80, 3,275,843,974.20 and 1,449,231,944.40
Double scale
Find fourth proportional to 1,091,947,992.40, 1,637,921,988.60 and 724,615,973.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.