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Finding the Fourth Proportional to 1,131.03, 1,560.29 and 658.80

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Solution

The fourth proportional to 1,131.03, 1,560.29 and 658.80 is: 908.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.03 : 1,560.29 = 658.80 : x
  2. Step 2: Convert to fraction form
    1,131.03/1,560.29 = 658.80/x
  3. Step 3: Cross multiply
    1,131.03x = 1,560.29 × 658.80
  4. Step 4: Simplify right side
    1,131.03x = 1,027,915.76
  5. Step 5: Solve for x
    x = 1,027,915.76/1,131.03
  6. Step 6: Final answer
    x = 908.83

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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.