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Finding the Fourth Proportional to 984.26, 1,358.28 and 542.18

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Solution

The fourth proportional to 984.26, 1,358.28 and 542.18 is: 748.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.26 : 1,358.28 = 542.18 : x
  2. Step 2: Convert to fraction form
    984.26/1,358.28 = 542.18/x
  3. Step 3: Cross multiply
    984.26x = 1,358.28 × 542.18
  4. Step 4: Simplify right side
    984.26x = 736,432.25
  5. Step 5: Solve for x
    x = 736,432.25/984.26
  6. Step 6: Final answer
    x = 748.21

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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.