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Finding the Fourth Proportional to 3,753.53, 5,631.21 and 1,288.38

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Solution

The fourth proportional to 3,753.53, 5,631.21 and 1,288.38 is: 1,932.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,753.53 : 5,631.21 = 1,288.38 : x
  2. Step 2: Convert to fraction form
    3,753.53/5,631.21 = 1,288.38/x
  3. Step 3: Cross multiply
    3,753.53x = 5,631.21 × 1,288.38
  4. Step 4: Simplify right side
    3,753.53x = 7,255,138.34
  5. Step 5: Solve for x
    x = 7,255,138.34/3,753.53
  6. Step 6: Final answer
    x = 1,932.89

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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.