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Finding the Fourth Proportional to 3,489.86, 4,817.88 and 2,691.44

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Solution

The fourth proportional to 3,489.86, 4,817.88 and 2,691.44 is: 3,715.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,489.86 : 4,817.88 = 2,691.44 : x
  2. Step 2: Convert to fraction form
    3,489.86/4,817.88 = 2,691.44/x
  3. Step 3: Cross multiply
    3,489.86x = 4,817.88 × 2,691.44
  4. Step 4: Simplify right side
    3,489.86x = 12,967,034.95
  5. Step 5: Solve for x
    x = 12,967,034.95/3,489.86
  6. Step 6: Final answer
    x = 3,715.63

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1.5x scale

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.