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Finding the Fourth Proportional to 724.14, 1,079.53 and 665.82

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Solution

The fourth proportional to 724.14, 1,079.53 and 665.82 is: 992.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.14 : 1,079.53 = 665.82 : x
  2. Step 2: Convert to fraction form
    724.14/1,079.53 = 665.82/x
  3. Step 3: Cross multiply
    724.14x = 1,079.53 × 665.82
  4. Step 4: Simplify right side
    724.14x = 718,771.00
  5. Step 5: Solve for x
    x = 718,771.00/724.14
  6. Step 6: Final answer
    x = 992.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.