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Finding the Fourth Proportional to 867.52, 1,298.76 and 674.56

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Solution

The fourth proportional to 867.52, 1,298.76 and 674.56 is: 1,009.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.52 : 1,298.76 = 674.56 : x
  2. Step 2: Convert to fraction form
    867.52/1,298.76 = 674.56/x
  3. Step 3: Cross multiply
    867.52x = 1,298.76 × 674.56
  4. Step 4: Simplify right side
    867.52x = 876,091.55
  5. Step 5: Solve for x
    x = 876,091.55/867.52
  6. Step 6: Final answer
    x = 1,009.88

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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.