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Finding the Fourth Proportional to 615,543.17, 921,614.36 and 315,377.42

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Solution

The fourth proportional to 615,543.17, 921,614.36 and 315,377.42 is: 472,194.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,543.17 : 921,614.36 = 315,377.42 : x
  2. Step 2: Convert to fraction form
    615,543.17/921,614.36 = 315,377.42/x
  3. Step 3: Cross multiply
    615,543.17x = 921,614.36 × 315,377.42
  4. Step 4: Simplify right side
    615,543.17x = 290,656,352,906.79
  5. Step 5: Solve for x
    x = 290,656,352,906.79/615,543.17
  6. Step 6: Final answer
    x = 472,194.92

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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.