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Finding the Fourth Proportional to 547.28, 820.96 and 157.31

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Solution

The fourth proportional to 547.28, 820.96 and 157.31 is: 235.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.28 : 820.96 = 157.31 : x
  2. Step 2: Convert to fraction form
    547.28/820.96 = 157.31/x
  3. Step 3: Cross multiply
    547.28x = 820.96 × 157.31
  4. Step 4: Simplify right side
    547.28x = 129,145.22
  5. Step 5: Solve for x
    x = 129,145.22/547.28
  6. Step 6: Final answer
    x = 235.98

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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.