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Finding the Fourth Proportional to 725.69, 1,087.17 and 562.58

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Solution

The fourth proportional to 725.69, 1,087.17 and 562.58 is: 842.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.69 : 1,087.17 = 562.58 : x
  2. Step 2: Convert to fraction form
    725.69/1,087.17 = 562.58/x
  3. Step 3: Cross multiply
    725.69x = 1,087.17 × 562.58
  4. Step 4: Simplify right side
    725.69x = 611,620.10
  5. Step 5: Solve for x
    x = 611,620.10/725.69
  6. Step 6: Final answer
    x = 842.81

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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.