Home / 2,255.71-3,112.75-1,247.35

Finding the Fourth Proportional to 2,255.71, 3,112.75 and 1,247.35

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Solution

The fourth proportional to 2,255.71, 3,112.75 and 1,247.35 is: 1,721.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.71 : 3,112.75 = 1,247.35 : x
  2. Step 2: Convert to fraction form
    2,255.71/3,112.75 = 1,247.35/x
  3. Step 3: Cross multiply
    2,255.71x = 3,112.75 × 1,247.35
  4. Step 4: Simplify right side
    2,255.71x = 3,882,690.26
  5. Step 5: Solve for x
    x = 3,882,690.26/2,255.71
  6. Step 6: Final answer
    x = 1,721.28

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1.5x scale

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.