Home / 1,988.14-2,979.96-1,012.18

Finding the Fourth Proportional to 1,988.14, 2,979.96 and 1,012.18

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Solution

The fourth proportional to 1,988.14, 2,979.96 and 1,012.18 is: 1,517.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.14 : 2,979.96 = 1,012.18 : x
  2. Step 2: Convert to fraction form
    1,988.14/2,979.96 = 1,012.18/x
  3. Step 3: Cross multiply
    1,988.14x = 2,979.96 × 1,012.18
  4. Step 4: Simplify right side
    1,988.14x = 3,016,255.91
  5. Step 5: Solve for x
    x = 3,016,255.91/1,988.14
  6. Step 6: Final answer
    x = 1,517.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.