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Finding the Fourth Proportional to 1,136.22, 1,703.97 and 724.74

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Solution

The fourth proportional to 1,136.22, 1,703.97 and 724.74 is: 1,086.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,136.22 : 1,703.97 = 724.74 : x
  2. Step 2: Convert to fraction form
    1,136.22/1,703.97 = 724.74/x
  3. Step 3: Cross multiply
    1,136.22x = 1,703.97 × 724.74
  4. Step 4: Simplify right side
    1,136.22x = 1,234,935.22
  5. Step 5: Solve for x
    x = 1,234,935.22/1,136.22
  6. Step 6: Final answer
    x = 1,086.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.