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Finding the Fourth Proportional to 3,217.76, 4,827.21 and 1,138.97

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Solution

The fourth proportional to 3,217.76, 4,827.21 and 1,138.97 is: 1,708.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,217.76 : 4,827.21 = 1,138.97 : x
  2. Step 2: Convert to fraction form
    3,217.76/4,827.21 = 1,138.97/x
  3. Step 3: Cross multiply
    3,217.76x = 4,827.21 × 1,138.97
  4. Step 4: Simplify right side
    3,217.76x = 5,498,017.54
  5. Step 5: Solve for x
    x = 5,498,017.54/3,217.76
  6. Step 6: Final answer
    x = 1,708.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.