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Finding the Fourth Proportional to 724,915.11, 1,000,355.18 and 402,645.88

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Solution

The fourth proportional to 724,915.11, 1,000,355.18 and 402,645.88 is: 555,635.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,915.11 : 1,000,355.18 = 402,645.88 : x
  2. Step 2: Convert to fraction form
    724,915.11/1,000,355.18 = 402,645.88/x
  3. Step 3: Cross multiply
    724,915.11x = 1,000,355.18 × 402,645.88
  4. Step 4: Simplify right side
    724,915.11x = 402,788,890,269.39
  5. Step 5: Solve for x
    x = 402,788,890,269.39/724,915.11
  6. Step 6: Final answer
    x = 555,635.94

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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.