Home / 1,268.11-1,902.30-343.63

Finding the Fourth Proportional to 1,268.11, 1,902.30 and 343.63

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Solution

The fourth proportional to 1,268.11, 1,902.30 and 343.63 is: 515.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.11 : 1,902.30 = 343.63 : x
  2. Step 2: Convert to fraction form
    1,268.11/1,902.30 = 343.63/x
  3. Step 3: Cross multiply
    1,268.11x = 1,902.30 × 343.63
  4. Step 4: Simplify right side
    1,268.11x = 653,687.35
  5. Step 5: Solve for x
    x = 653,687.35/1,268.11
  6. Step 6: Final answer
    x = 515.48

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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.