Home / 2,045.24-3,067.93-639.78

Finding the Fourth Proportional to 2,045.24, 3,067.93 and 639.78

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Solution

The fourth proportional to 2,045.24, 3,067.93 and 639.78 is: 959.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,045.24 : 3,067.93 = 639.78 : x
  2. Step 2: Convert to fraction form
    2,045.24/3,067.93 = 639.78/x
  3. Step 3: Cross multiply
    2,045.24x = 3,067.93 × 639.78
  4. Step 4: Simplify right side
    2,045.24x = 1,962,808.72
  5. Step 5: Solve for x
    x = 1,962,808.72/2,045.24
  6. Step 6: Final answer
    x = 959.70

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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.