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Finding the Fourth Proportional to 427.97, 641.52 and 242.61

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Solution

The fourth proportional to 427.97, 641.52 and 242.61 is: 363.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.97 : 641.52 = 242.61 : x
  2. Step 2: Convert to fraction form
    427.97/641.52 = 242.61/x
  3. Step 3: Cross multiply
    427.97x = 641.52 × 242.61
  4. Step 4: Simplify right side
    427.97x = 155,636.76
  5. Step 5: Solve for x
    x = 155,636.76/427.97
  6. Step 6: Final answer
    x = 363.66

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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.