Home / 1,987.65-2,743.49-1,241.15

Finding the Fourth Proportional to 1,987.65, 2,743.49 and 1,241.15

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Solution

The fourth proportional to 1,987.65, 2,743.49 and 1,241.15 is: 1,713.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.65 : 2,743.49 = 1,241.15 : x
  2. Step 2: Convert to fraction form
    1,987.65/2,743.49 = 1,241.15/x
  3. Step 3: Cross multiply
    1,987.65x = 2,743.49 × 1,241.15
  4. Step 4: Simplify right side
    1,987.65x = 3,405,076.41
  5. Step 5: Solve for x
    x = 3,405,076.41/1,987.65
  6. Step 6: Final answer
    x = 1,713.12

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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.