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Finding the Fourth Proportional to 391,150.68, 539,743.26 and 219,044.71

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Solution

The fourth proportional to 391,150.68, 539,743.26 and 219,044.71 is: 302,256.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,150.68 : 539,743.26 = 219,044.71 : x
  2. Step 2: Convert to fraction form
    391,150.68/539,743.26 = 219,044.71/x
  3. Step 3: Cross multiply
    391,150.68x = 539,743.26 × 219,044.71
  4. Step 4: Simplify right side
    391,150.68x = 118,227,905,861.16
  5. Step 5: Solve for x
    x = 118,227,905,861.16/391,150.68
  6. Step 6: Final answer
    x = 302,256.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.