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Finding the Fourth Proportional to 625,655.77, 938,419.07 and 424,543.18

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Solution

The fourth proportional to 625,655.77, 938,419.07 and 424,543.18 is: 636,770.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,655.77 : 938,419.07 = 424,543.18 : x
  2. Step 2: Convert to fraction form
    625,655.77/938,419.07 = 424,543.18/x
  3. Step 3: Cross multiply
    625,655.77x = 938,419.07 × 424,543.18
  4. Step 4: Simplify right side
    625,655.77x = 398,399,416,150.44
  5. Step 5: Solve for x
    x = 398,399,416,150.44/625,655.77
  6. Step 6: Final answer
    x = 636,770.95

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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.