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Finding the Fourth Proportional to 1,003.14, 1,505.07 and 725.76

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Solution

The fourth proportional to 1,003.14, 1,505.07 and 725.76 is: 1,088.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.14 : 1,505.07 = 725.76 : x
  2. Step 2: Convert to fraction form
    1,003.14/1,505.07 = 725.76/x
  3. Step 3: Cross multiply
    1,003.14x = 1,505.07 × 725.76
  4. Step 4: Simplify right side
    1,003.14x = 1,092,319.60
  5. Step 5: Solve for x
    x = 1,092,319.60/1,003.14
  6. Step 6: Final answer
    x = 1,088.90

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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.