Home / 2,026.21-3,039.45-639.61

Finding the Fourth Proportional to 2,026.21, 3,039.45 and 639.61

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Solution

The fourth proportional to 2,026.21, 3,039.45 and 639.61 is: 959.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,026.21 : 3,039.45 = 639.61 : x
  2. Step 2: Convert to fraction form
    2,026.21/3,039.45 = 639.61/x
  3. Step 3: Cross multiply
    2,026.21x = 3,039.45 × 639.61
  4. Step 4: Simplify right side
    2,026.21x = 1,944,057.41
  5. Step 5: Solve for x
    x = 1,944,057.41/2,026.21
  6. Step 6: Final answer
    x = 959.46

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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.