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Finding the Fourth Proportional to 389,517.56, 584,340.89 and 136,732.46

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Solution

The fourth proportional to 389,517.56, 584,340.89 and 136,732.46 is: 205,121.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,517.56 : 584,340.89 = 136,732.46 : x
  2. Step 2: Convert to fraction form
    389,517.56/584,340.89 = 136,732.46/x
  3. Step 3: Cross multiply
    389,517.56x = 584,340.89 × 136,732.46
  4. Step 4: Simplify right side
    389,517.56x = 79,898,364,788.42
  5. Step 5: Solve for x
    x = 79,898,364,788.42/389,517.56
  6. Step 6: Final answer
    x = 205,121.35

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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.