Home / 1,834.40-2,749.20-1,320.80

Finding the Fourth Proportional to 1,834.40, 2,749.20 and 1,320.80

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Solution

The fourth proportional to 1,834.40, 2,749.20 and 1,320.80 is: 1,979.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,834.40 : 2,749.20 = 1,320.80 : x
  2. Step 2: Convert to fraction form
    1,834.40/2,749.20 = 1,320.80/x
  3. Step 3: Cross multiply
    1,834.40x = 2,749.20 × 1,320.80
  4. Step 4: Simplify right side
    1,834.40x = 3,631,143.36
  5. Step 5: Solve for x
    x = 3,631,143.36/1,834.40
  6. Step 6: Final answer
    x = 1,979.47

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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.