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Finding the Fourth Proportional to 1,127.26, 1,691 and 305.52

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Solution

The fourth proportional to 1,127.26, 1,691 and 305.52 is: 458.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.26 : 1,691 = 305.52 : x
  2. Step 2: Convert to fraction form
    1,127.26/1,691 = 305.52/x
  3. Step 3: Cross multiply
    1,127.26x = 1,691 × 305.52
  4. Step 4: Simplify right side
    1,127.26x = 516,634.32
  5. Step 5: Solve for x
    x = 516,634.32/1,127.26
  6. Step 6: Final answer
    x = 458.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.