Home / 1,979.78-2,732.10-1,095.56

Finding the Fourth Proportional to 1,979.78, 2,732.10 and 1,095.56

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Solution

The fourth proportional to 1,979.78, 2,732.10 and 1,095.56 is: 1,511.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.78 : 2,732.10 = 1,095.56 : x
  2. Step 2: Convert to fraction form
    1,979.78/2,732.10 = 1,095.56/x
  3. Step 3: Cross multiply
    1,979.78x = 2,732.10 × 1,095.56
  4. Step 4: Simplify right side
    1,979.78x = 2,993,179.48
  5. Step 5: Solve for x
    x = 2,993,179.48/1,979.78
  6. Step 6: Final answer
    x = 1,511.87

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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.