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Finding the Fourth Proportional to 616.83, 851.27 and 395.70

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Solution

The fourth proportional to 616.83, 851.27 and 395.70 is: 546.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.83 : 851.27 = 395.70 : x
  2. Step 2: Convert to fraction form
    616.83/851.27 = 395.70/x
  3. Step 3: Cross multiply
    616.83x = 851.27 × 395.70
  4. Step 4: Simplify right side
    616.83x = 336,845.56
  5. Step 5: Solve for x
    x = 336,845.56/616.83
  6. Step 6: Final answer
    x = 546.09

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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.