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Finding the Fourth Proportional to 616.96, 851.38 and 354.98

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Solution

The fourth proportional to 616.96, 851.38 and 354.98 is: 489.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.96 : 851.38 = 354.98 : x
  2. Step 2: Convert to fraction form
    616.96/851.38 = 354.98/x
  3. Step 3: Cross multiply
    616.96x = 851.38 × 354.98
  4. Step 4: Simplify right side
    616.96x = 302,222.87
  5. Step 5: Solve for x
    x = 302,222.87/616.96
  6. Step 6: Final answer
    x = 489.86

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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.