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Finding the Fourth Proportional to 1,201.73, 1,658.39 and 677.76

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Solution

The fourth proportional to 1,201.73, 1,658.39 and 677.76 is: 935.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.73 : 1,658.39 = 677.76 : x
  2. Step 2: Convert to fraction form
    1,201.73/1,658.39 = 677.76/x
  3. Step 3: Cross multiply
    1,201.73x = 1,658.39 × 677.76
  4. Step 4: Simplify right side
    1,201.73x = 1,123,990.41
  5. Step 5: Solve for x
    x = 1,123,990.41/1,201.73
  6. Step 6: Final answer
    x = 935.31

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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.