Home / 1,987.88-2,741.74-1,240.46

Finding the Fourth Proportional to 1,987.88, 2,741.74 and 1,240.46

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Solution

The fourth proportional to 1,987.88, 2,741.74 and 1,240.46 is: 1,710.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.88 : 2,741.74 = 1,240.46 : x
  2. Step 2: Convert to fraction form
    1,987.88/2,741.74 = 1,240.46/x
  3. Step 3: Cross multiply
    1,987.88x = 2,741.74 × 1,240.46
  4. Step 4: Simplify right side
    1,987.88x = 3,401,018.80
  5. Step 5: Solve for x
    x = 3,401,018.80/1,987.88
  6. Step 6: Final answer
    x = 1,710.88

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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.