Home / 1,913.24-2,869.29-680.49

Finding the Fourth Proportional to 1,913.24, 2,869.29 and 680.49

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Solution

The fourth proportional to 1,913.24, 2,869.29 and 680.49 is: 1,020.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.24 : 2,869.29 = 680.49 : x
  2. Step 2: Convert to fraction form
    1,913.24/2,869.29 = 680.49/x
  3. Step 3: Cross multiply
    1,913.24x = 2,869.29 × 680.49
  4. Step 4: Simplify right side
    1,913.24x = 1,952,523.15
  5. Step 5: Solve for x
    x = 1,952,523.15/1,913.24
  6. Step 6: Final answer
    x = 1,020.53

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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.