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Finding the Fourth Proportional to 962.12, 1,326.84 and 630.43

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Solution

The fourth proportional to 962.12, 1,326.84 and 630.43 is: 869.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.12 : 1,326.84 = 630.43 : x
  2. Step 2: Convert to fraction form
    962.12/1,326.84 = 630.43/x
  3. Step 3: Cross multiply
    962.12x = 1,326.84 × 630.43
  4. Step 4: Simplify right side
    962.12x = 836,473.11
  5. Step 5: Solve for x
    x = 836,473.11/962.12
  6. Step 6: Final answer
    x = 869.41

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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.