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Finding the Fourth Proportional to 1,251.34, 1,875.90 and 634.18

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Solution

The fourth proportional to 1,251.34, 1,875.90 and 634.18 is: 950.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.34 : 1,875.90 = 634.18 : x
  2. Step 2: Convert to fraction form
    1,251.34/1,875.90 = 634.18/x
  3. Step 3: Cross multiply
    1,251.34x = 1,875.90 × 634.18
  4. Step 4: Simplify right side
    1,251.34x = 1,189,658.26
  5. Step 5: Solve for x
    x = 1,189,658.26/1,251.34
  6. Step 6: Final answer
    x = 950.71

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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.