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Finding the Fourth Proportional to 1,201.68, 1,658.32 and 677.71

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Solution

The fourth proportional to 1,201.68, 1,658.32 and 677.71 is: 935.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.68 : 1,658.32 = 677.71 : x
  2. Step 2: Convert to fraction form
    1,201.68/1,658.32 = 677.71/x
  3. Step 3: Cross multiply
    1,201.68x = 1,658.32 × 677.71
  4. Step 4: Simplify right side
    1,201.68x = 1,123,856.66
  5. Step 5: Solve for x
    x = 1,123,856.66/1,201.68
  6. Step 6: Final answer
    x = 935.24

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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.