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Finding the Fourth Proportional to 1,001.43, 1,382.05 and 559.41

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Solution

The fourth proportional to 1,001.43, 1,382.05 and 559.41 is: 772.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.43 : 1,382.05 = 559.41 : x
  2. Step 2: Convert to fraction form
    1,001.43/1,382.05 = 559.41/x
  3. Step 3: Cross multiply
    1,001.43x = 1,382.05 × 559.41
  4. Step 4: Simplify right side
    1,001.43x = 773,124.96
  5. Step 5: Solve for x
    x = 773,124.96/1,001.43
  6. Step 6: Final answer
    x = 772.02

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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.