Home / 2,140.20-3,207.90-1,099.80

Finding the Fourth Proportional to 2,140.20, 3,207.90 and 1,099.80

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Solution

The fourth proportional to 2,140.20, 3,207.90 and 1,099.80 is: 1,648.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.20 : 3,207.90 = 1,099.80 : x
  2. Step 2: Convert to fraction form
    2,140.20/3,207.90 = 1,099.80/x
  3. Step 3: Cross multiply
    2,140.20x = 3,207.90 × 1,099.80
  4. Step 4: Simplify right side
    2,140.20x = 3,528,048.42
  5. Step 5: Solve for x
    x = 3,528,048.42/2,140.20
  6. Step 6: Final answer
    x = 1,648.47

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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.