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Finding the Fourth Proportional to 615,123.85, 922,685.78 and 331,688.65

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Solution

The fourth proportional to 615,123.85, 922,685.78 and 331,688.65 is: 497,532.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,123.85 : 922,685.78 = 331,688.65 : x
  2. Step 2: Convert to fraction form
    615,123.85/922,685.78 = 331,688.65/x
  3. Step 3: Cross multiply
    615,123.85x = 922,685.78 × 331,688.65
  4. Step 4: Simplify right side
    615,123.85x = 306,044,399,083.95
  5. Step 5: Solve for x
    x = 306,044,399,083.95/615,123.85
  6. Step 6: Final answer
    x = 497,532.98

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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.