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Finding the Fourth Proportional to 1,174.52, 1,617.15 and 997.13

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Solution

The fourth proportional to 1,174.52, 1,617.15 and 997.13 is: 1,372.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.52 : 1,617.15 = 997.13 : x
  2. Step 2: Convert to fraction form
    1,174.52/1,617.15 = 997.13/x
  3. Step 3: Cross multiply
    1,174.52x = 1,617.15 × 997.13
  4. Step 4: Simplify right side
    1,174.52x = 1,612,504.89
  5. Step 5: Solve for x
    x = 1,612,504.89/1,174.52
  6. Step 6: Final answer
    x = 1,372.91

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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.