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Finding the Fourth Proportional to 416.27, 622.77 and 278.66

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Solution

The fourth proportional to 416.27, 622.77 and 278.66 is: 416.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.27 : 622.77 = 278.66 : x
  2. Step 2: Convert to fraction form
    416.27/622.77 = 278.66/x
  3. Step 3: Cross multiply
    416.27x = 622.77 × 278.66
  4. Step 4: Simplify right side
    416.27x = 173,537.97
  5. Step 5: Solve for x
    x = 173,537.97/416.27
  6. Step 6: Final answer
    x = 416.89

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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.