Home / 2,255.45-3,112.32-1,260.87

Finding the Fourth Proportional to 2,255.45, 3,112.32 and 1,260.87

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Solution

The fourth proportional to 2,255.45, 3,112.32 and 1,260.87 is: 1,739.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.45 : 3,112.32 = 1,260.87 : x
  2. Step 2: Convert to fraction form
    2,255.45/3,112.32 = 1,260.87/x
  3. Step 3: Cross multiply
    2,255.45x = 3,112.32 × 1,260.87
  4. Step 4: Simplify right side
    2,255.45x = 3,924,223.98
  5. Step 5: Solve for x
    x = 3,924,223.98/2,255.45
  6. Step 6: Final answer
    x = 1,739.89

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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.