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Finding the Fourth Proportional to 475.32, 655.84 and 278.88

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Solution

The fourth proportional to 475.32, 655.84 and 278.88 is: 384.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.32 : 655.84 = 278.88 : x
  2. Step 2: Convert to fraction form
    475.32/655.84 = 278.88/x
  3. Step 3: Cross multiply
    475.32x = 655.84 × 278.88
  4. Step 4: Simplify right side
    475.32x = 182,900.66
  5. Step 5: Solve for x
    x = 182,900.66/475.32
  6. Step 6: Final answer
    x = 384.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.