Home / 2,681.23-4,019.40-1,987.06

Finding the Fourth Proportional to 2,681.23, 4,019.40 and 1,987.06

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Solution

The fourth proportional to 2,681.23, 4,019.40 and 1,987.06 is: 2,978.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,681.23 : 4,019.40 = 1,987.06 : x
  2. Step 2: Convert to fraction form
    2,681.23/4,019.40 = 1,987.06/x
  3. Step 3: Cross multiply
    2,681.23x = 4,019.40 × 1,987.06
  4. Step 4: Simplify right side
    2,681.23x = 7,986,788.96
  5. Step 5: Solve for x
    x = 7,986,788.96/2,681.23
  6. Step 6: Final answer
    x = 2,978.78

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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.