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Finding the Fourth Proportional to 417.41, 626.29 and 212.11

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Solution

The fourth proportional to 417.41, 626.29 and 212.11 is: 318.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.41 : 626.29 = 212.11 : x
  2. Step 2: Convert to fraction form
    417.41/626.29 = 212.11/x
  3. Step 3: Cross multiply
    417.41x = 626.29 × 212.11
  4. Step 4: Simplify right side
    417.41x = 132,842.37
  5. Step 5: Solve for x
    x = 132,842.37/417.41
  6. Step 6: Final answer
    x = 318.25

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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.