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Finding the Fourth Proportional to 854.22, 1,279.16 and 546.42

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Solution

The fourth proportional to 854.22, 1,279.16 and 546.42 is: 818.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.22 : 1,279.16 = 546.42 : x
  2. Step 2: Convert to fraction form
    854.22/1,279.16 = 546.42/x
  3. Step 3: Cross multiply
    854.22x = 1,279.16 × 546.42
  4. Step 4: Simplify right side
    854.22x = 698,958.61
  5. Step 5: Solve for x
    x = 698,958.61/854.22
  6. Step 6: Final answer
    x = 818.24

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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.