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Finding the Fourth Proportional to 1,253.27, 1,729.14 and 1,087.22

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Solution

The fourth proportional to 1,253.27, 1,729.14 and 1,087.22 is: 1,500.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.27 : 1,729.14 = 1,087.22 : x
  2. Step 2: Convert to fraction form
    1,253.27/1,729.14 = 1,087.22/x
  3. Step 3: Cross multiply
    1,253.27x = 1,729.14 × 1,087.22
  4. Step 4: Simplify right side
    1,253.27x = 1,879,955.59
  5. Step 5: Solve for x
    x = 1,879,955.59/1,253.27
  6. Step 6: Final answer
    x = 1,500.04

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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.