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Finding the Fourth Proportional to 962.41, 1,326.72 and 681.78

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Solution

The fourth proportional to 962.41, 1,326.72 and 681.78 is: 939.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.41 : 1,326.72 = 681.78 : x
  2. Step 2: Convert to fraction form
    962.41/1,326.72 = 681.78/x
  3. Step 3: Cross multiply
    962.41x = 1,326.72 × 681.78
  4. Step 4: Simplify right side
    962.41x = 904,531.16
  5. Step 5: Solve for x
    x = 904,531.16/962.41
  6. Step 6: Final answer
    x = 939.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.