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Finding the Fourth Proportional to 408.88, 566.47 and 398.86

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Solution

The fourth proportional to 408.88, 566.47 and 398.86 is: 552.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.88 : 566.47 = 398.86 : x
  2. Step 2: Convert to fraction form
    408.88/566.47 = 398.86/x
  3. Step 3: Cross multiply
    408.88x = 566.47 × 398.86
  4. Step 4: Simplify right side
    408.88x = 225,942.22
  5. Step 5: Solve for x
    x = 225,942.22/408.88
  6. Step 6: Final answer
    x = 552.59

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.