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Finding the Fourth Proportional to 718,294.60, 991,253.46 and 396,017.20

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Solution

The fourth proportional to 718,294.60, 991,253.46 and 396,017.20 is: 546,507.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,294.60 : 991,253.46 = 396,017.20 : x
  2. Step 2: Convert to fraction form
    718,294.60/991,253.46 = 396,017.20/x
  3. Step 3: Cross multiply
    718,294.60x = 991,253.46 × 396,017.20
  4. Step 4: Simplify right side
    718,294.60x = 392,553,419,719.51
  5. Step 5: Solve for x
    x = 392,553,419,719.51/718,294.60
  6. Step 6: Final answer
    x = 546,507.55

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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.