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Finding the Fourth Proportional to 417.65, 626.09 and 222.66

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Solution

The fourth proportional to 417.65, 626.09 and 222.66 is: 333.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.65 : 626.09 = 222.66 : x
  2. Step 2: Convert to fraction form
    417.65/626.09 = 222.66/x
  3. Step 3: Cross multiply
    417.65x = 626.09 × 222.66
  4. Step 4: Simplify right side
    417.65x = 139,404.09
  5. Step 5: Solve for x
    x = 139,404.09/417.65
  6. Step 6: Final answer
    x = 333.79

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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.