Home / 2,688.20-4,032.66-839.44

Finding the Fourth Proportional to 2,688.20, 4,032.66 and 839.44

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Solution

The fourth proportional to 2,688.20, 4,032.66 and 839.44 is: 1,259.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.20 : 4,032.66 = 839.44 : x
  2. Step 2: Convert to fraction form
    2,688.20/4,032.66 = 839.44/x
  3. Step 3: Cross multiply
    2,688.20x = 4,032.66 × 839.44
  4. Step 4: Simplify right side
    2,688.20x = 3,385,176.11
  5. Step 5: Solve for x
    x = 3,385,176.11/2,688.20
  6. Step 6: Final answer
    x = 1,259.27

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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.