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Finding the Fourth Proportional to 980.74, 1,469.97 and 363.97

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Solution

The fourth proportional to 980.74, 1,469.97 and 363.97 is: 545.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.74 : 1,469.97 = 363.97 : x
  2. Step 2: Convert to fraction form
    980.74/1,469.97 = 363.97/x
  3. Step 3: Cross multiply
    980.74x = 1,469.97 × 363.97
  4. Step 4: Simplify right side
    980.74x = 535,024.98
  5. Step 5: Solve for x
    x = 535,024.98/980.74
  6. Step 6: Final answer
    x = 545.53

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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.