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Finding the Fourth Proportional to 447.90, 671.58 and 242.70

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Solution

The fourth proportional to 447.90, 671.58 and 242.70 is: 363.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.90 : 671.58 = 242.70 : x
  2. Step 2: Convert to fraction form
    447.90/671.58 = 242.70/x
  3. Step 3: Cross multiply
    447.90x = 671.58 × 242.70
  4. Step 4: Simplify right side
    447.90x = 162,992.47
  5. Step 5: Solve for x
    x = 162,992.47/447.90
  6. Step 6: Final answer
    x = 363.90

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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.