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Finding the Fourth Proportional to 486.27, 729.33 and 157.25

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Solution

The fourth proportional to 486.27, 729.33 and 157.25 is: 235.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.27 : 729.33 = 157.25 : x
  2. Step 2: Convert to fraction form
    486.27/729.33 = 157.25/x
  3. Step 3: Cross multiply
    486.27x = 729.33 × 157.25
  4. Step 4: Simplify right side
    486.27x = 114,687.14
  5. Step 5: Solve for x
    x = 114,687.14/486.27
  6. Step 6: Final answer
    x = 235.85

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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.