Home / 3,378.38-4,662.51-1,981.58

Finding the Fourth Proportional to 3,378.38, 4,662.51 and 1,981.58

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Solution

The fourth proportional to 3,378.38, 4,662.51 and 1,981.58 is: 2,734.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,378.38 : 4,662.51 = 1,981.58 : x
  2. Step 2: Convert to fraction form
    3,378.38/4,662.51 = 1,981.58/x
  3. Step 3: Cross multiply
    3,378.38x = 4,662.51 × 1,981.58
  4. Step 4: Simplify right side
    3,378.38x = 9,239,136.57
  5. Step 5: Solve for x
    x = 9,239,136.57/3,378.38
  6. Step 6: Final answer
    x = 2,734.78

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Double scale
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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.