Home / 1,979.49-2,731.60-1,083.20

Finding the Fourth Proportional to 1,979.49, 2,731.60 and 1,083.20

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Solution

The fourth proportional to 1,979.49, 2,731.60 and 1,083.20 is: 1,494.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.49 : 2,731.60 = 1,083.20 : x
  2. Step 2: Convert to fraction form
    1,979.49/2,731.60 = 1,083.20/x
  3. Step 3: Cross multiply
    1,979.49x = 2,731.60 × 1,083.20
  4. Step 4: Simplify right side
    1,979.49x = 2,958,869.12
  5. Step 5: Solve for x
    x = 2,958,869.12/1,979.49
  6. Step 6: Final answer
    x = 1,494.76

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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.