Home / 1,912.23-2,869.26-680.53

Finding the Fourth Proportional to 1,912.23, 2,869.26 and 680.53

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Solution

The fourth proportional to 1,912.23, 2,869.26 and 680.53 is: 1,021.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.23 : 2,869.26 = 680.53 : x
  2. Step 2: Convert to fraction form
    1,912.23/2,869.26 = 680.53/x
  3. Step 3: Cross multiply
    1,912.23x = 2,869.26 × 680.53
  4. Step 4: Simplify right side
    1,912.23x = 1,952,617.51
  5. Step 5: Solve for x
    x = 1,952,617.51/1,912.23
  6. Step 6: Final answer
    x = 1,021.12

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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.