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Finding the Fourth Proportional to 417.22, 625.32 and 211.48

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Solution

The fourth proportional to 417.22, 625.32 and 211.48 is: 316.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.22 : 625.32 = 211.48 : x
  2. Step 2: Convert to fraction form
    417.22/625.32 = 211.48/x
  3. Step 3: Cross multiply
    417.22x = 625.32 × 211.48
  4. Step 4: Simplify right side
    417.22x = 132,242.67
  5. Step 5: Solve for x
    x = 132,242.67/417.22
  6. Step 6: Final answer
    x = 316.96

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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.