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Finding the Fourth Proportional to 379.62, 568.62 and 255.80

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Solution

The fourth proportional to 379.62, 568.62 and 255.80 is: 383.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.62 : 568.62 = 255.80 : x
  2. Step 2: Convert to fraction form
    379.62/568.62 = 255.80/x
  3. Step 3: Cross multiply
    379.62x = 568.62 × 255.80
  4. Step 4: Simplify right side
    379.62x = 145,454.42
  5. Step 5: Solve for x
    x = 145,454.42/379.62
  6. Step 6: Final answer
    x = 383.16

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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.