Home / 2,255.56-3,111.80-1,311.19

Finding the Fourth Proportional to 2,255.56, 3,111.80 and 1,311.19

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Solution

The fourth proportional to 2,255.56, 3,111.80 and 1,311.19 is: 1,808.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.56 : 3,111.80 = 1,311.19 : x
  2. Step 2: Convert to fraction form
    2,255.56/3,111.80 = 1,311.19/x
  3. Step 3: Cross multiply
    2,255.56x = 3,111.80 × 1,311.19
  4. Step 4: Simplify right side
    2,255.56x = 4,080,146.71
  5. Step 5: Solve for x
    x = 4,080,146.71/2,255.56
  6. Step 6: Final answer
    x = 1,808.93

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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.