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Finding the Fourth Proportional to 579.34, 869.49 and 542.85

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Solution

The fourth proportional to 579.34, 869.49 and 542.85 is: 814.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.34 : 869.49 = 542.85 : x
  2. Step 2: Convert to fraction form
    579.34/869.49 = 542.85/x
  3. Step 3: Cross multiply
    579.34x = 869.49 × 542.85
  4. Step 4: Simplify right side
    579.34x = 471,995.58
  5. Step 5: Solve for x
    x = 471,995.58/579.34
  6. Step 6: Final answer
    x = 814.72

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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.