Home / 1,979.92-2,732.52-1,140.76

Finding the Fourth Proportional to 1,979.92, 2,732.52 and 1,140.76

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Solution

The fourth proportional to 1,979.92, 2,732.52 and 1,140.76 is: 1,574.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.92 : 2,732.52 = 1,140.76 : x
  2. Step 2: Convert to fraction form
    1,979.92/2,732.52 = 1,140.76/x
  3. Step 3: Cross multiply
    1,979.92x = 2,732.52 × 1,140.76
  4. Step 4: Simplify right side
    1,979.92x = 3,117,149.52
  5. Step 5: Solve for x
    x = 3,117,149.52/1,979.92
  6. Step 6: Final answer
    x = 1,574.38

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Half scale
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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.