Home / 2,681.33-4,016.46-1,988.78

Finding the Fourth Proportional to 2,681.33, 4,016.46 and 1,988.78

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Solution

The fourth proportional to 2,681.33, 4,016.46 and 1,988.78 is: 2,979.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,681.33 : 4,016.46 = 1,988.78 : x
  2. Step 2: Convert to fraction form
    2,681.33/4,016.46 = 1,988.78/x
  3. Step 3: Cross multiply
    2,681.33x = 4,016.46 × 1,988.78
  4. Step 4: Simplify right side
    2,681.33x = 7,987,855.32
  5. Step 5: Solve for x
    x = 7,987,855.32/2,681.33
  6. Step 6: Final answer
    x = 2,979.06

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1.5x scale

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.