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Finding the Fourth Proportional to 982, 1,472.46 and 874

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Solution

The fourth proportional to 982, 1,472.46 and 874 is: 1,310.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    982 : 1,472.46 = 874 : x
  2. Step 2: Convert to fraction form
    982/1,472.46 = 874/x
  3. Step 3: Cross multiply
    982x = 1,472.46 × 874
  4. Step 4: Simplify right side
    982x = 1,286,930.04
  5. Step 5: Solve for x
    x = 1,286,930.04/982
  6. Step 6: Final answer
    x = 1,310.52

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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.