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Finding the Fourth Proportional to 1,037.73, 1,432.14 and 688.17

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Solution

The fourth proportional to 1,037.73, 1,432.14 and 688.17 is: 949.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,037.73 : 1,432.14 = 688.17 : x
  2. Step 2: Convert to fraction form
    1,037.73/1,432.14 = 688.17/x
  3. Step 3: Cross multiply
    1,037.73x = 1,432.14 × 688.17
  4. Step 4: Simplify right side
    1,037.73x = 985,555.78
  5. Step 5: Solve for x
    x = 985,555.78/1,037.73
  6. Step 6: Final answer
    x = 949.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.