Home / 1,979.80-2,732.01-1,095.55

Finding the Fourth Proportional to 1,979.80, 2,732.01 and 1,095.55

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Solution

The fourth proportional to 1,979.80, 2,732.01 and 1,095.55 is: 1,511.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.80 : 2,732.01 = 1,095.55 : x
  2. Step 2: Convert to fraction form
    1,979.80/2,732.01 = 1,095.55/x
  3. Step 3: Cross multiply
    1,979.80x = 2,732.01 × 1,095.55
  4. Step 4: Simplify right side
    1,979.80x = 2,993,048.78
  5. Step 5: Solve for x
    x = 2,993,048.78/1,979.80
  6. Step 6: Final answer
    x = 1,511.80

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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.