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Finding the Fourth Proportional to 391,641.92, 586,191.90 and 211,476.86

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Solution

The fourth proportional to 391,641.92, 586,191.90 and 211,476.86 is: 316,528.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,641.92 : 586,191.90 = 211,476.86 : x
  2. Step 2: Convert to fraction form
    391,641.92/586,191.90 = 211,476.86/x
  3. Step 3: Cross multiply
    391,641.92x = 586,191.90 × 211,476.86
  4. Step 4: Simplify right side
    391,641.92x = 123,966,022,369.43
  5. Step 5: Solve for x
    x = 123,966,022,369.43/391,641.92
  6. Step 6: Final answer
    x = 316,528.99

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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.