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Finding the Fourth Proportional to 391,047.71, 586,793.43 and 211,130.72

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Solution

The fourth proportional to 391,047.71, 586,793.43 and 211,130.72 is: 316,815.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,047.71 : 586,793.43 = 211,130.72 : x
  2. Step 2: Convert to fraction form
    391,047.71/586,793.43 = 211,130.72/x
  3. Step 3: Cross multiply
    391,047.71x = 586,793.43 × 211,130.72
  4. Step 4: Simplify right side
    391,047.71x = 123,890,119,367.17
  5. Step 5: Solve for x
    x = 123,890,119,367.17/391,047.71
  6. Step 6: Final answer
    x = 316,815.87

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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.