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Finding the Fourth Proportional to 974.88, 1,462.40 and 487.92

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Solution

The fourth proportional to 974.88, 1,462.40 and 487.92 is: 731.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.88 : 1,462.40 = 487.92 : x
  2. Step 2: Convert to fraction form
    974.88/1,462.40 = 487.92/x
  3. Step 3: Cross multiply
    974.88x = 1,462.40 × 487.92
  4. Step 4: Simplify right side
    974.88x = 713,534.21
  5. Step 5: Solve for x
    x = 713,534.21/974.88
  6. Step 6: Final answer
    x = 731.92

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Double scale
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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.