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Finding the Fourth Proportional to 980.38, 1,352.90 and 532.23

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Solution

The fourth proportional to 980.38, 1,352.90 and 532.23 is: 734.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.38 : 1,352.90 = 532.23 : x
  2. Step 2: Convert to fraction form
    980.38/1,352.90 = 532.23/x
  3. Step 3: Cross multiply
    980.38x = 1,352.90 × 532.23
  4. Step 4: Simplify right side
    980.38x = 720,053.97
  5. Step 5: Solve for x
    x = 720,053.97/980.38
  6. Step 6: Final answer
    x = 734.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.