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Finding the Fourth Proportional to 836.80, 1,154.35 and 542.16

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Solution

The fourth proportional to 836.80, 1,154.35 and 542.16 is: 747.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.80 : 1,154.35 = 542.16 : x
  2. Step 2: Convert to fraction form
    836.80/1,154.35 = 542.16/x
  3. Step 3: Cross multiply
    836.80x = 1,154.35 × 542.16
  4. Step 4: Simplify right side
    836.80x = 625,843.07
  5. Step 5: Solve for x
    x = 625,843.07/836.80
  6. Step 6: Final answer
    x = 747.90

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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.