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Finding the Fourth Proportional to 615,195.90, 922,939.65 and 315,722.70

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Solution

The fourth proportional to 615,195.90, 922,939.65 and 315,722.70 is: 473,658.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,195.90 : 922,939.65 = 315,722.70 : x
  2. Step 2: Convert to fraction form
    615,195.90/922,939.65 = 315,722.70/x
  3. Step 3: Cross multiply
    615,195.90x = 922,939.65 × 315,722.70
  4. Step 4: Simplify right side
    615,195.90x = 291,392,998,235.06
  5. Step 5: Solve for x
    x = 291,392,998,235.06/615,195.90
  6. Step 6: Final answer
    x = 473,658.88

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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.