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Finding the Fourth Proportional to 417.88, 625.96 and 272.88

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Solution

The fourth proportional to 417.88, 625.96 and 272.88 is: 408.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.88 : 625.96 = 272.88 : x
  2. Step 2: Convert to fraction form
    417.88/625.96 = 272.88/x
  3. Step 3: Cross multiply
    417.88x = 625.96 × 272.88
  4. Step 4: Simplify right side
    417.88x = 170,811.96
  5. Step 5: Solve for x
    x = 170,811.96/417.88
  6. Step 6: Final answer
    x = 408.76

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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.