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Finding the Fourth Proportional to 547.34, 820.85 and 239.11

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Solution

The fourth proportional to 547.34, 820.85 and 239.11 is: 358.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.34 : 820.85 = 239.11 : x
  2. Step 2: Convert to fraction form
    547.34/820.85 = 239.11/x
  3. Step 3: Cross multiply
    547.34x = 820.85 × 239.11
  4. Step 4: Simplify right side
    547.34x = 196,270.20
  5. Step 5: Solve for x
    x = 196,270.20/547.34
  6. Step 6: Final answer
    x = 358.59

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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.