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Finding the Fourth Proportional to 389,959.56, 584,951.26 and 133,788.53

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Solution

The fourth proportional to 389,959.56, 584,951.26 and 133,788.53 is: 200,686.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,959.56 : 584,951.26 = 133,788.53 : x
  2. Step 2: Convert to fraction form
    389,959.56/584,951.26 = 133,788.53/x
  3. Step 3: Cross multiply
    389,959.56x = 584,951.26 × 133,788.53
  4. Step 4: Simplify right side
    389,959.56x = 78,259,769,197.05
  5. Step 5: Solve for x
    x = 78,259,769,197.05/389,959.56
  6. Step 6: Final answer
    x = 200,686.88

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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.