Home / 1,981.10-2,956.10-1,806.48

Finding the Fourth Proportional to 1,981.10, 2,956.10 and 1,806.48

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Solution

The fourth proportional to 1,981.10, 2,956.10 and 1,806.48 is: 2,695.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.10 : 2,956.10 = 1,806.48 : x
  2. Step 2: Convert to fraction form
    1,981.10/2,956.10 = 1,806.48/x
  3. Step 3: Cross multiply
    1,981.10x = 2,956.10 × 1,806.48
  4. Step 4: Simplify right side
    1,981.10x = 5,340,135.53
  5. Step 5: Solve for x
    x = 5,340,135.53/1,981.10
  6. Step 6: Final answer
    x = 2,695.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.