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Finding the Fourth Proportional to 1,126.26, 1,553.22 and 727.74

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Solution

The fourth proportional to 1,126.26, 1,553.22 and 727.74 is: 1,003.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.26 : 1,553.22 = 727.74 : x
  2. Step 2: Convert to fraction form
    1,126.26/1,553.22 = 727.74/x
  3. Step 3: Cross multiply
    1,126.26x = 1,553.22 × 727.74
  4. Step 4: Simplify right side
    1,126.26x = 1,130,340.32
  5. Step 5: Solve for x
    x = 1,130,340.32/1,126.26
  6. Step 6: Final answer
    x = 1,003.62

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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.