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Finding the Fourth Proportional to 1,001.61, 1,382.22 and 553.48

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Solution

The fourth proportional to 1,001.61, 1,382.22 and 553.48 is: 763.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.61 : 1,382.22 = 553.48 : x
  2. Step 2: Convert to fraction form
    1,001.61/1,382.22 = 553.48/x
  3. Step 3: Cross multiply
    1,001.61x = 1,382.22 × 553.48
  4. Step 4: Simplify right side
    1,001.61x = 765,031.13
  5. Step 5: Solve for x
    x = 765,031.13/1,001.61
  6. Step 6: Final answer
    x = 763.80

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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.