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Finding the Fourth Proportional to 616.68, 851.18 and 395.82

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Solution

The fourth proportional to 616.68, 851.18 and 395.82 is: 546.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.68 : 851.18 = 395.82 : x
  2. Step 2: Convert to fraction form
    616.68/851.18 = 395.82/x
  3. Step 3: Cross multiply
    616.68x = 851.18 × 395.82
  4. Step 4: Simplify right side
    616.68x = 336,912.09
  5. Step 5: Solve for x
    x = 336,912.09/616.68
  6. Step 6: Final answer
    x = 546.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.