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Finding the Fourth Proportional to 616.54, 850.85 and 354.55

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Solution

The fourth proportional to 616.54, 850.85 and 354.55 is: 489.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.54 : 850.85 = 354.55 : x
  2. Step 2: Convert to fraction form
    616.54/850.85 = 354.55/x
  3. Step 3: Cross multiply
    616.54x = 850.85 × 354.55
  4. Step 4: Simplify right side
    616.54x = 301,667.09
  5. Step 5: Solve for x
    x = 301,667.09/616.54
  6. Step 6: Final answer
    x = 489.29

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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.