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Finding the Fourth Proportional to 1,112.91, 1,534.61 and 758.88

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Solution

The fourth proportional to 1,112.91, 1,534.61 and 758.88 is: 1,046.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.91 : 1,534.61 = 758.88 : x
  2. Step 2: Convert to fraction form
    1,112.91/1,534.61 = 758.88/x
  3. Step 3: Cross multiply
    1,112.91x = 1,534.61 × 758.88
  4. Step 4: Simplify right side
    1,112.91x = 1,164,581.04
  5. Step 5: Solve for x
    x = 1,164,581.04/1,112.91
  6. Step 6: Final answer
    x = 1,046.43

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1.5x scale

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.