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Finding the Fourth Proportional to 1,982.25, 2,974.02 and 749.76

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Solution

The fourth proportional to 1,982.25, 2,974.02 and 749.76 is: 1,124.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.25 : 2,974.02 = 749.76 : x
  2. Step 2: Convert to fraction form
    1,982.25/2,974.02 = 749.76/x
  3. Step 3: Cross multiply
    1,982.25x = 2,974.02 × 749.76
  4. Step 4: Simplify right side
    1,982.25x = 2,229,801.24
  5. Step 5: Solve for x
    x = 2,229,801.24/1,982.25
  6. Step 6: Final answer
    x = 1,124.88

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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.