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Finding the Fourth Proportional to 984.26, 1,358.26 and 542.15

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Solution

The fourth proportional to 984.26, 1,358.26 and 542.15 is: 748.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.26 : 1,358.26 = 542.15 : x
  2. Step 2: Convert to fraction form
    984.26/1,358.26 = 542.15/x
  3. Step 3: Cross multiply
    984.26x = 1,358.26 × 542.15
  4. Step 4: Simplify right side
    984.26x = 736,371.16
  5. Step 5: Solve for x
    x = 736,371.16/984.26
  6. Step 6: Final answer
    x = 748.15

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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.