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Finding the Fourth Proportional to 378.44, 567 and 256.64

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Solution

The fourth proportional to 378.44, 567 and 256.64 is: 384.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.44 : 567 = 256.64 : x
  2. Step 2: Convert to fraction form
    378.44/567 = 256.64/x
  3. Step 3: Cross multiply
    378.44x = 567 × 256.64
  4. Step 4: Simplify right side
    378.44x = 145,514.88
  5. Step 5: Solve for x
    x = 145,514.88/378.44
  6. Step 6: Final answer
    x = 384.51

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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.