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Finding the Fourth Proportional to 755.32, 1,131.75 and 726.49

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Solution

The fourth proportional to 755.32, 1,131.75 and 726.49 is: 1,088.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.32 : 1,131.75 = 726.49 : x
  2. Step 2: Convert to fraction form
    755.32/1,131.75 = 726.49/x
  3. Step 3: Cross multiply
    755.32x = 1,131.75 × 726.49
  4. Step 4: Simplify right side
    755.32x = 822,201.43
  5. Step 5: Solve for x
    x = 822,201.43/755.32
  6. Step 6: Final answer
    x = 1,088.55

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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.