Home / 1,121.85-1,682.29-371.15

Finding the Fourth Proportional to 1,121.85, 1,682.29 and 371.15

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Solution

The fourth proportional to 1,121.85, 1,682.29 and 371.15 is: 556.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.85 : 1,682.29 = 371.15 : x
  2. Step 2: Convert to fraction form
    1,121.85/1,682.29 = 371.15/x
  3. Step 3: Cross multiply
    1,121.85x = 1,682.29 × 371.15
  4. Step 4: Simplify right side
    1,121.85x = 624,380.29
  5. Step 5: Solve for x
    x = 624,380.29/1,121.85
  6. Step 6: Final answer
    x = 556.56

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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.