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Finding the Fourth Proportional to 417.37, 625.92 and 211.90

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Solution

The fourth proportional to 417.37, 625.92 and 211.90 is: 317.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.37 : 625.92 = 211.90 : x
  2. Step 2: Convert to fraction form
    417.37/625.92 = 211.90/x
  3. Step 3: Cross multiply
    417.37x = 625.92 × 211.90
  4. Step 4: Simplify right side
    417.37x = 132,632.45
  5. Step 5: Solve for x
    x = 132,632.45/417.37
  6. Step 6: Final answer
    x = 317.78

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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.