Home / 2,026.25-3,039.96-639.78

Finding the Fourth Proportional to 2,026.25, 3,039.96 and 639.78

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Solution

The fourth proportional to 2,026.25, 3,039.96 and 639.78 is: 959.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,026.25 : 3,039.96 = 639.78 : x
  2. Step 2: Convert to fraction form
    2,026.25/3,039.96 = 639.78/x
  3. Step 3: Cross multiply
    2,026.25x = 3,039.96 × 639.78
  4. Step 4: Simplify right side
    2,026.25x = 1,944,905.61
  5. Step 5: Solve for x
    x = 1,944,905.61/2,026.25
  6. Step 6: Final answer
    x = 959.85

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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.