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Finding the Fourth Proportional to 379.68, 568.78 and 240.43

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Solution

The fourth proportional to 379.68, 568.78 and 240.43 is: 360.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.68 : 568.78 = 240.43 : x
  2. Step 2: Convert to fraction form
    379.68/568.78 = 240.43/x
  3. Step 3: Cross multiply
    379.68x = 568.78 × 240.43
  4. Step 4: Simplify right side
    379.68x = 136,751.78
  5. Step 5: Solve for x
    x = 136,751.78/379.68
  6. Step 6: Final answer
    x = 360.18

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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.