Home / 1,986.65-2,742.50-1,241.09

Finding the Fourth Proportional to 1,986.65, 2,742.50 and 1,241.09

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Solution

The fourth proportional to 1,986.65, 2,742.50 and 1,241.09 is: 1,713.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.65 : 2,742.50 = 1,241.09 : x
  2. Step 2: Convert to fraction form
    1,986.65/2,742.50 = 1,241.09/x
  3. Step 3: Cross multiply
    1,986.65x = 2,742.50 × 1,241.09
  4. Step 4: Simplify right side
    1,986.65x = 3,403,689.98
  5. Step 5: Solve for x
    x = 3,403,689.98/1,986.65
  6. Step 6: Final answer
    x = 1,713.28

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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.