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Finding the Fourth Proportional to 474,139.60, 709,459.80 and 432,149.20

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Solution

The fourth proportional to 474,139.60, 709,459.80 and 432,149.20 is: 646,629.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    474,139.60 : 709,459.80 = 432,149.20 : x
  2. Step 2: Convert to fraction form
    474,139.60/709,459.80 = 432,149.20/x
  3. Step 3: Cross multiply
    474,139.60x = 709,459.80 × 432,149.20
  4. Step 4: Simplify right side
    474,139.60x = 306,592,485,002.16
  5. Step 5: Solve for x
    x = 306,592,485,002.16/474,139.60
  6. Step 6: Final answer
    x = 646,629.15

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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.