Home / 3,205.30-4,422.80-1,807.78

Finding the Fourth Proportional to 3,205.30, 4,422.80 and 1,807.78

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Solution

The fourth proportional to 3,205.30, 4,422.80 and 1,807.78 is: 2,494.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,205.30 : 4,422.80 = 1,807.78 : x
  2. Step 2: Convert to fraction form
    3,205.30/4,422.80 = 1,807.78/x
  3. Step 3: Cross multiply
    3,205.30x = 4,422.80 × 1,807.78
  4. Step 4: Simplify right side
    3,205.30x = 7,995,449.38
  5. Step 5: Solve for x
    x = 7,995,449.38/3,205.30
  6. Step 6: Final answer
    x = 2,494.45

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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.