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Finding the Fourth Proportional to 509.31, 763.96 and 124.56

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Solution

The fourth proportional to 509.31, 763.96 and 124.56 is: 186.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.31 : 763.96 = 124.56 : x
  2. Step 2: Convert to fraction form
    509.31/763.96 = 124.56/x
  3. Step 3: Cross multiply
    509.31x = 763.96 × 124.56
  4. Step 4: Simplify right side
    509.31x = 95,156.32
  5. Step 5: Solve for x
    x = 95,156.32/509.31
  6. Step 6: Final answer
    x = 186.83

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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.