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Finding the Fourth Proportional to 486.67, 729.55 and 242.96

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Solution

The fourth proportional to 486.67, 729.55 and 242.96 is: 364.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.67 : 729.55 = 242.96 : x
  2. Step 2: Convert to fraction form
    486.67/729.55 = 242.96/x
  3. Step 3: Cross multiply
    486.67x = 729.55 × 242.96
  4. Step 4: Simplify right side
    486.67x = 177,251.47
  5. Step 5: Solve for x
    x = 177,251.47/486.67
  6. Step 6: Final answer
    x = 364.21

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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.