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Finding the Fourth Proportional to 1,001.62, 1,382.42 and 628.93

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Solution

The fourth proportional to 1,001.62, 1,382.42 and 628.93 is: 868.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.62 : 1,382.42 = 628.93 : x
  2. Step 2: Convert to fraction form
    1,001.62/1,382.42 = 628.93/x
  3. Step 3: Cross multiply
    1,001.62x = 1,382.42 × 628.93
  4. Step 4: Simplify right side
    1,001.62x = 869,445.41
  5. Step 5: Solve for x
    x = 869,445.41/1,001.62
  6. Step 6: Final answer
    x = 868.04

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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.