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Finding the Fourth Proportional to 391,131.59, 586,944.17 and 166,491.65

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Solution

The fourth proportional to 391,131.59, 586,944.17 and 166,491.65 is: 249,842.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,131.59 : 586,944.17 = 166,491.65 : x
  2. Step 2: Convert to fraction form
    391,131.59/586,944.17 = 166,491.65/x
  3. Step 3: Cross multiply
    391,131.59x = 586,944.17 × 166,491.65
  4. Step 4: Simplify right side
    391,131.59x = 97,721,305,516.94
  5. Step 5: Solve for x
    x = 97,721,305,516.94/391,131.59
  6. Step 6: Final answer
    x = 249,842.53

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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.