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Finding the Fourth Proportional to 725.53, 1,000.98 and 445.55

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Solution

The fourth proportional to 725.53, 1,000.98 and 445.55 is: 614.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.53 : 1,000.98 = 445.55 : x
  2. Step 2: Convert to fraction form
    725.53/1,000.98 = 445.55/x
  3. Step 3: Cross multiply
    725.53x = 1,000.98 × 445.55
  4. Step 4: Simplify right side
    725.53x = 445,986.64
  5. Step 5: Solve for x
    x = 445,986.64/725.53
  6. Step 6: Final answer
    x = 614.70

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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.