Home / 2,688.30-4,032.14-839.25

Finding the Fourth Proportional to 2,688.30, 4,032.14 and 839.25

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Solution

The fourth proportional to 2,688.30, 4,032.14 and 839.25 is: 1,258.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.30 : 4,032.14 = 839.25 : x
  2. Step 2: Convert to fraction form
    2,688.30/4,032.14 = 839.25/x
  3. Step 3: Cross multiply
    2,688.30x = 4,032.14 × 839.25
  4. Step 4: Simplify right side
    2,688.30x = 3,383,969.30
  5. Step 5: Solve for x
    x = 3,383,969.30/2,688.30
  6. Step 6: Final answer
    x = 1,258.78

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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.