Home / 1,913.25-2,869.92-680.70

Finding the Fourth Proportional to 1,913.25, 2,869.92 and 680.70

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Solution

The fourth proportional to 1,913.25, 2,869.92 and 680.70 is: 1,021.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.25 : 2,869.92 = 680.70 : x
  2. Step 2: Convert to fraction form
    1,913.25/2,869.92 = 680.70/x
  3. Step 3: Cross multiply
    1,913.25x = 2,869.92 × 680.70
  4. Step 4: Simplify right side
    1,913.25x = 1,953,554.54
  5. Step 5: Solve for x
    x = 1,953,554.54/1,913.25
  6. Step 6: Final answer
    x = 1,021.07

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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.