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Finding the Fourth Proportional to 1,227.22, 1,693.11 and 729.88

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Solution

The fourth proportional to 1,227.22, 1,693.11 and 729.88 is: 1,006.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,227.22 : 1,693.11 = 729.88 : x
  2. Step 2: Convert to fraction form
    1,227.22/1,693.11 = 729.88/x
  3. Step 3: Cross multiply
    1,227.22x = 1,693.11 × 729.88
  4. Step 4: Simplify right side
    1,227.22x = 1,235,767.13
  5. Step 5: Solve for x
    x = 1,235,767.13/1,227.22
  6. Step 6: Final answer
    x = 1,006.96

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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.