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Finding the Fourth Proportional to 754.91, 1,134.89 and 618.97

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Solution

The fourth proportional to 754.91, 1,134.89 and 618.97 is: 930.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.91 : 1,134.89 = 618.97 : x
  2. Step 2: Convert to fraction form
    754.91/1,134.89 = 618.97/x
  3. Step 3: Cross multiply
    754.91x = 1,134.89 × 618.97
  4. Step 4: Simplify right side
    754.91x = 702,454.09
  5. Step 5: Solve for x
    x = 702,454.09/754.91
  6. Step 6: Final answer
    x = 930.51

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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.