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Finding the Fourth Proportional to 509.25, 763.89 and 124.50

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Solution

The fourth proportional to 509.25, 763.89 and 124.50 is: 186.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.25 : 763.89 = 124.50 : x
  2. Step 2: Convert to fraction form
    509.25/763.89 = 124.50/x
  3. Step 3: Cross multiply
    509.25x = 763.89 × 124.50
  4. Step 4: Simplify right side
    509.25x = 95,104.31
  5. Step 5: Solve for x
    x = 95,104.31/509.25
  6. Step 6: Final answer
    x = 186.75

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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.