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Finding the Fourth Proportional to 616.55, 850.92 and 354.56

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Solution

The fourth proportional to 616.55, 850.92 and 354.56 is: 489.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.55 : 850.92 = 354.56 : x
  2. Step 2: Convert to fraction form
    616.55/850.92 = 354.56/x
  3. Step 3: Cross multiply
    616.55x = 850.92 × 354.56
  4. Step 4: Simplify right side
    616.55x = 301,702.99
  5. Step 5: Solve for x
    x = 301,702.99/616.55
  6. Step 6: Final answer
    x = 489.34

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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.