Home / 2,026.78-3,040.50-639.79

Finding the Fourth Proportional to 2,026.78, 3,040.50 and 639.79

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Solution

The fourth proportional to 2,026.78, 3,040.50 and 639.79 is: 959.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,026.78 : 3,040.50 = 639.79 : x
  2. Step 2: Convert to fraction form
    2,026.78/3,040.50 = 639.79/x
  3. Step 3: Cross multiply
    2,026.78x = 3,040.50 × 639.79
  4. Step 4: Simplify right side
    2,026.78x = 1,945,276.29
  5. Step 5: Solve for x
    x = 1,945,276.29/2,026.78
  6. Step 6: Final answer
    x = 959.79

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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.