Home / 2,255.78-3,112.99-1,261.08

Finding the Fourth Proportional to 2,255.78, 3,112.99 and 1,261.08

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Solution

The fourth proportional to 2,255.78, 3,112.99 and 1,261.08 is: 1,740.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.78 : 3,112.99 = 1,261.08 : x
  2. Step 2: Convert to fraction form
    2,255.78/3,112.99 = 1,261.08/x
  3. Step 3: Cross multiply
    2,255.78x = 3,112.99 × 1,261.08
  4. Step 4: Simplify right side
    2,255.78x = 3,925,726.28
  5. Step 5: Solve for x
    x = 3,925,726.28/2,255.78
  6. Step 6: Final answer
    x = 1,740.29

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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.