Home / 1,981.83-2,731.77-1,508.19

Finding the Fourth Proportional to 1,981.83, 2,731.77 and 1,508.19

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Solution

The fourth proportional to 1,981.83, 2,731.77 and 1,508.19 is: 2,078.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.83 : 2,731.77 = 1,508.19 : x
  2. Step 2: Convert to fraction form
    1,981.83/2,731.77 = 1,508.19/x
  3. Step 3: Cross multiply
    1,981.83x = 2,731.77 × 1,508.19
  4. Step 4: Simplify right side
    1,981.83x = 4,120,028.20
  5. Step 5: Solve for x
    x = 4,120,028.20/1,981.83
  6. Step 6: Final answer
    x = 2,078.90

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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.