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Finding the Fourth Proportional to 753.26, 1,123.82 and 671.18

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Solution

The fourth proportional to 753.26, 1,123.82 and 671.18 is: 1,001.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.26 : 1,123.82 = 671.18 : x
  2. Step 2: Convert to fraction form
    753.26/1,123.82 = 671.18/x
  3. Step 3: Cross multiply
    753.26x = 1,123.82 × 671.18
  4. Step 4: Simplify right side
    753.26x = 754,285.51
  5. Step 5: Solve for x
    x = 754,285.51/753.26
  6. Step 6: Final answer
    x = 1,001.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.