Home / 1,396.38-2,094.87-422.55

Finding the Fourth Proportional to 1,396.38, 2,094.87 and 422.55

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Solution

The fourth proportional to 1,396.38, 2,094.87 and 422.55 is: 633.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.38 : 2,094.87 = 422.55 : x
  2. Step 2: Convert to fraction form
    1,396.38/2,094.87 = 422.55/x
  3. Step 3: Cross multiply
    1,396.38x = 2,094.87 × 422.55
  4. Step 4: Simplify right side
    1,396.38x = 885,195.66
  5. Step 5: Solve for x
    x = 885,195.66/1,396.38
  6. Step 6: Final answer
    x = 633.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.