Home / 2,025.78-3,039.10-639.52

Finding the Fourth Proportional to 2,025.78, 3,039.10 and 639.52

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Solution

The fourth proportional to 2,025.78, 3,039.10 and 639.52 is: 959.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,025.78 : 3,039.10 = 639.52 : x
  2. Step 2: Convert to fraction form
    2,025.78/3,039.10 = 639.52/x
  3. Step 3: Cross multiply
    2,025.78x = 3,039.10 × 639.52
  4. Step 4: Simplify right side
    2,025.78x = 1,943,565.23
  5. Step 5: Solve for x
    x = 1,943,565.23/2,025.78
  6. Step 6: Final answer
    x = 959.42

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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.