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Finding the Fourth Proportional to 982.89, 1,474.31 and 252.47

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Solution

The fourth proportional to 982.89, 1,474.31 and 252.47 is: 378.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.89 : 1,474.31 = 252.47 : x
  2. Step 2: Convert to fraction form
    982.89/1,474.31 = 252.47/x
  3. Step 3: Cross multiply
    982.89x = 1,474.31 × 252.47
  4. Step 4: Simplify right side
    982.89x = 372,223.36
  5. Step 5: Solve for x
    x = 372,223.36/982.89
  6. Step 6: Final answer
    x = 378.70

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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.