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Finding the Fourth Proportional to 834.41, 1,249.30 and 542.25

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Solution

The fourth proportional to 834.41, 1,249.30 and 542.25 is: 811.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.41 : 1,249.30 = 542.25 : x
  2. Step 2: Convert to fraction form
    834.41/1,249.30 = 542.25/x
  3. Step 3: Cross multiply
    834.41x = 1,249.30 × 542.25
  4. Step 4: Simplify right side
    834.41x = 677,423.97
  5. Step 5: Solve for x
    x = 677,423.97/834.41
  6. Step 6: Final answer
    x = 811.86

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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.