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Finding the Fourth Proportional to 616.96, 851.28 and 355.04

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Solution

The fourth proportional to 616.96, 851.28 and 355.04 is: 489.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.96 : 851.28 = 355.04 : x
  2. Step 2: Convert to fraction form
    616.96/851.28 = 355.04/x
  3. Step 3: Cross multiply
    616.96x = 851.28 × 355.04
  4. Step 4: Simplify right side
    616.96x = 302,238.45
  5. Step 5: Solve for x
    x = 302,238.45/616.96
  6. Step 6: Final answer
    x = 489.88

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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.