Home / 1,987.20-2,738.48-1,955.34

Finding the Fourth Proportional to 1,987.20, 2,738.48 and 1,955.34

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Solution

The fourth proportional to 1,987.20, 2,738.48 and 1,955.34 is: 2,694.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.20 : 2,738.48 = 1,955.34 : x
  2. Step 2: Convert to fraction form
    1,987.20/2,738.48 = 1,955.34/x
  3. Step 3: Cross multiply
    1,987.20x = 2,738.48 × 1,955.34
  4. Step 4: Simplify right side
    1,987.20x = 5,354,649.71
  5. Step 5: Solve for x
    x = 5,354,649.71/1,987.20
  6. Step 6: Final answer
    x = 2,694.57

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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.