Home / 1,011,127.56-1,395,987.12-643,812

Finding the Fourth Proportional to 1,011,127.56, 1,395,987.12 and 643,812

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Solution

The fourth proportional to 1,011,127.56, 1,395,987.12 and 643,812 is: 888,862.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011,127.56 : 1,395,987.12 = 643,812 : x
  2. Step 2: Convert to fraction form
    1,011,127.56/1,395,987.12 = 643,812/x
  3. Step 3: Cross multiply
    1,011,127.56x = 1,395,987.12 × 643,812
  4. Step 4: Simplify right side
    1,011,127.56x = 898,753,259,701.44
  5. Step 5: Solve for x
    x = 898,753,259,701.44/1,011,127.56
  6. Step 6: Final answer
    x = 888,862.39

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.