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Finding the Fourth Proportional to 725.92, 1,089.16 and 573.44

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Solution

The fourth proportional to 725.92, 1,089.16 and 573.44 is: 860.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.92 : 1,089.16 = 573.44 : x
  2. Step 2: Convert to fraction form
    725.92/1,089.16 = 573.44/x
  3. Step 3: Cross multiply
    725.92x = 1,089.16 × 573.44
  4. Step 4: Simplify right side
    725.92x = 624,567.91
  5. Step 5: Solve for x
    x = 624,567.91/725.92
  6. Step 6: Final answer
    x = 860.38

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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.