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Finding the Fourth Proportional to 411.89, 616.82 and 274.79

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Solution

The fourth proportional to 411.89, 616.82 and 274.79 is: 411.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.89 : 616.82 = 274.79 : x
  2. Step 2: Convert to fraction form
    411.89/616.82 = 274.79/x
  3. Step 3: Cross multiply
    411.89x = 616.82 × 274.79
  4. Step 4: Simplify right side
    411.89x = 169,496.14
  5. Step 5: Solve for x
    x = 169,496.14/411.89
  6. Step 6: Final answer
    x = 411.51

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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.