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Finding the Fourth Proportional to 379.31, 568.96 and 242.21

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Solution

The fourth proportional to 379.31, 568.96 and 242.21 is: 363.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.31 : 568.96 = 242.21 : x
  2. Step 2: Convert to fraction form
    379.31/568.96 = 242.21/x
  3. Step 3: Cross multiply
    379.31x = 568.96 × 242.21
  4. Step 4: Simplify right side
    379.31x = 137,808.62
  5. Step 5: Solve for x
    x = 137,808.62/379.31
  6. Step 6: Final answer
    x = 363.32

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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.