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Finding the Fourth Proportional to 500.87, 751.28 and 135.63

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Solution

The fourth proportional to 500.87, 751.28 and 135.63 is: 203.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.87 : 751.28 = 135.63 : x
  2. Step 2: Convert to fraction form
    500.87/751.28 = 135.63/x
  3. Step 3: Cross multiply
    500.87x = 751.28 × 135.63
  4. Step 4: Simplify right side
    500.87x = 101,898.75
  5. Step 5: Solve for x
    x = 101,898.75/500.87
  6. Step 6: Final answer
    x = 203.44

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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.