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Finding the Fourth Proportional to 901.88, 1,350.45 and 725.24

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Solution

The fourth proportional to 901.88, 1,350.45 and 725.24 is: 1,085.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.88 : 1,350.45 = 725.24 : x
  2. Step 2: Convert to fraction form
    901.88/1,350.45 = 725.24/x
  3. Step 3: Cross multiply
    901.88x = 1,350.45 × 725.24
  4. Step 4: Simplify right side
    901.88x = 979,400.36
  5. Step 5: Solve for x
    x = 979,400.36/901.88
  6. Step 6: Final answer
    x = 1,085.96

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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.