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Finding the Fourth Proportional to 486.38, 729.56 and 157.59

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Solution

The fourth proportional to 486.38, 729.56 and 157.59 is: 236.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.38 : 729.56 = 157.59 : x
  2. Step 2: Convert to fraction form
    486.38/729.56 = 157.59/x
  3. Step 3: Cross multiply
    486.38x = 729.56 × 157.59
  4. Step 4: Simplify right side
    486.38x = 114,971.75
  5. Step 5: Solve for x
    x = 114,971.75/486.38
  6. Step 6: Final answer
    x = 236.39

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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.