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Finding the Fourth Proportional to 1,123.92, 1,551.14 and 681.95

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Solution

The fourth proportional to 1,123.92, 1,551.14 and 681.95 is: 941.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.92 : 1,551.14 = 681.95 : x
  2. Step 2: Convert to fraction form
    1,123.92/1,551.14 = 681.95/x
  3. Step 3: Cross multiply
    1,123.92x = 1,551.14 × 681.95
  4. Step 4: Simplify right side
    1,123.92x = 1,057,799.92
  5. Step 5: Solve for x
    x = 1,057,799.92/1,123.92
  6. Step 6: Final answer
    x = 941.17

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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.