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Finding the Fourth Proportional to 379.38, 568.08 and 256.17

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Solution

The fourth proportional to 379.38, 568.08 and 256.17 is: 383.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.38 : 568.08 = 256.17 : x
  2. Step 2: Convert to fraction form
    379.38/568.08 = 256.17/x
  3. Step 3: Cross multiply
    379.38x = 568.08 × 256.17
  4. Step 4: Simplify right side
    379.38x = 145,525.05
  5. Step 5: Solve for x
    x = 145,525.05/379.38
  6. Step 6: Final answer
    x = 383.59

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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.