Home / 1,091,520,985.20-1,637,281,477.80-315,191,972.40

Finding the Fourth Proportional to 1,091,520,985.20, 1,637,281,477.80 and 315,191,972.40

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Solution

The fourth proportional to 1,091,520,985.20, 1,637,281,477.80 and 315,191,972.40 is: 472,787,958.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091,520,985.20 : 1,637,281,477.80 = 315,191,972.40 : x
  2. Step 2: Convert to fraction form
    1,091,520,985.20/1,637,281,477.80 = 315,191,972.40/x
  3. Step 3: Cross multiply
    1,091,520,985.20x = 1,637,281,477.80 × 315,191,972.40
  4. Step 4: Simplify right side
    1,091,520,985.20x = 516,057,978,361,768,768
  5. Step 5: Solve for x
    x = 516,057,978,361,768,768/1,091,520,985.20
  6. Step 6: Final answer
    x = 472,787,958.60

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Double scale
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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.