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Finding the Fourth Proportional to 547.92, 821.91 and 157.92

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Solution

The fourth proportional to 547.92, 821.91 and 157.92 is: 236.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.92 : 821.91 = 157.92 : x
  2. Step 2: Convert to fraction form
    547.92/821.91 = 157.92/x
  3. Step 3: Cross multiply
    547.92x = 821.91 × 157.92
  4. Step 4: Simplify right side
    547.92x = 129,796.03
  5. Step 5: Solve for x
    x = 129,796.03/547.92
  6. Step 6: Final answer
    x = 236.89

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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.