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Finding the Fourth Proportional to 3,239.87, 4,470.39 and 1,981.19

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Solution

The fourth proportional to 3,239.87, 4,470.39 and 1,981.19 is: 2,733.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,239.87 : 4,470.39 = 1,981.19 : x
  2. Step 2: Convert to fraction form
    3,239.87/4,470.39 = 1,981.19/x
  3. Step 3: Cross multiply
    3,239.87x = 4,470.39 × 1,981.19
  4. Step 4: Simplify right side
    3,239.87x = 8,856,703.14
  5. Step 5: Solve for x
    x = 8,856,703.14/3,239.87
  6. Step 6: Final answer
    x = 2,733.66

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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.