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Finding the Fourth Proportional to 980.97, 1,472.22 and 365.28

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Solution

The fourth proportional to 980.97, 1,472.22 and 365.28 is: 548.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.97 : 1,472.22 = 365.28 : x
  2. Step 2: Convert to fraction form
    980.97/1,472.22 = 365.28/x
  3. Step 3: Cross multiply
    980.97x = 1,472.22 × 365.28
  4. Step 4: Simplify right side
    980.97x = 537,772.52
  5. Step 5: Solve for x
    x = 537,772.52/980.97
  6. Step 6: Final answer
    x = 548.20

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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.