Home / 2,855.32-3,940.45-1,807.38

Finding the Fourth Proportional to 2,855.32, 3,940.45 and 1,807.38

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Solution

The fourth proportional to 2,855.32, 3,940.45 and 1,807.38 is: 2,494.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.32 : 3,940.45 = 1,807.38 : x
  2. Step 2: Convert to fraction form
    2,855.32/3,940.45 = 1,807.38/x
  3. Step 3: Cross multiply
    2,855.32x = 3,940.45 × 1,807.38
  4. Step 4: Simplify right side
    2,855.32x = 7,121,886.00
  5. Step 5: Solve for x
    x = 7,121,886.00/2,855.32
  6. Step 6: Final answer
    x = 2,494.25

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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.