Home / 1,289.43-1,791.79-1,276.11

Finding the Fourth Proportional to 1,289.43, 1,791.79 and 1,276.11

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Solution

The fourth proportional to 1,289.43, 1,791.79 and 1,276.11 is: 1,773.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.43 : 1,791.79 = 1,276.11 : x
  2. Step 2: Convert to fraction form
    1,289.43/1,791.79 = 1,276.11/x
  3. Step 3: Cross multiply
    1,289.43x = 1,791.79 × 1,276.11
  4. Step 4: Simplify right side
    1,289.43x = 2,286,517.95
  5. Step 5: Solve for x
    x = 2,286,517.95/1,289.43
  6. Step 6: Final answer
    x = 1,773.28

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.