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Finding the Fourth Proportional to 982.63, 1,474.38 and 489.53

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Solution

The fourth proportional to 982.63, 1,474.38 and 489.53 is: 734.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.63 : 1,474.38 = 489.53 : x
  2. Step 2: Convert to fraction form
    982.63/1,474.38 = 489.53/x
  3. Step 3: Cross multiply
    982.63x = 1,474.38 × 489.53
  4. Step 4: Simplify right side
    982.63x = 721,748.63
  5. Step 5: Solve for x
    x = 721,748.63/982.63
  6. Step 6: Final answer
    x = 734.51

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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.