Home / 1,811.64-2,500.38-1,222.20

Finding the Fourth Proportional to 1,811.64, 2,500.38 and 1,222.20

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Solution

The fourth proportional to 1,811.64, 2,500.38 and 1,222.20 is: 1,686.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.64 : 2,500.38 = 1,222.20 : x
  2. Step 2: Convert to fraction form
    1,811.64/2,500.38 = 1,222.20/x
  3. Step 3: Cross multiply
    1,811.64x = 2,500.38 × 1,222.20
  4. Step 4: Simplify right side
    1,811.64x = 3,055,964.44
  5. Step 5: Solve for x
    x = 3,055,964.44/1,811.64
  6. Step 6: Final answer
    x = 1,686.85

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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.