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Finding the Fourth Proportional to 416.75, 625.29 and 221.74

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Solution

The fourth proportional to 416.75, 625.29 and 221.74 is: 332.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.75 : 625.29 = 221.74 : x
  2. Step 2: Convert to fraction form
    416.75/625.29 = 221.74/x
  3. Step 3: Cross multiply
    416.75x = 625.29 × 221.74
  4. Step 4: Simplify right side
    416.75x = 138,651.28
  5. Step 5: Solve for x
    x = 138,651.28/416.75
  6. Step 6: Final answer
    x = 332.70

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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.