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Finding the Fourth Proportional to 475.36, 655.44 and 440.80

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Solution

The fourth proportional to 475.36, 655.44 and 440.80 is: 607.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.36 : 655.44 = 440.80 : x
  2. Step 2: Convert to fraction form
    475.36/655.44 = 440.80/x
  3. Step 3: Cross multiply
    475.36x = 655.44 × 440.80
  4. Step 4: Simplify right side
    475.36x = 288,917.95
  5. Step 5: Solve for x
    x = 288,917.95/475.36
  6. Step 6: Final answer
    x = 607.79

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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.