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Finding the Fourth Proportional to 415.29, 622.95 and 269.10

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Solution

The fourth proportional to 415.29, 622.95 and 269.10 is: 403.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.29 : 622.95 = 269.10 : x
  2. Step 2: Convert to fraction form
    415.29/622.95 = 269.10/x
  3. Step 3: Cross multiply
    415.29x = 622.95 × 269.10
  4. Step 4: Simplify right side
    415.29x = 167,635.85
  5. Step 5: Solve for x
    x = 167,635.85/415.29
  6. Step 6: Final answer
    x = 403.66

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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.