Home / 2,255.19-3,112.40-1,310.91

Finding the Fourth Proportional to 2,255.19, 3,112.40 and 1,310.91

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Solution

The fourth proportional to 2,255.19, 3,112.40 and 1,310.91 is: 1,809.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.19 : 3,112.40 = 1,310.91 : x
  2. Step 2: Convert to fraction form
    2,255.19/3,112.40 = 1,310.91/x
  3. Step 3: Cross multiply
    2,255.19x = 3,112.40 × 1,310.91
  4. Step 4: Simplify right side
    2,255.19x = 4,080,072.96
  5. Step 5: Solve for x
    x = 4,080,072.96/2,255.19
  6. Step 6: Final answer
    x = 1,809.19

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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.