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Finding the Fourth Proportional to 982.74, 1,474.78 and 495.66

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Solution

The fourth proportional to 982.74, 1,474.78 and 495.66 is: 743.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.74 : 1,474.78 = 495.66 : x
  2. Step 2: Convert to fraction form
    982.74/1,474.78 = 495.66/x
  3. Step 3: Cross multiply
    982.74x = 1,474.78 × 495.66
  4. Step 4: Simplify right side
    982.74x = 730,989.45
  5. Step 5: Solve for x
    x = 730,989.45/982.74
  6. Step 6: Final answer
    x = 743.83

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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.