Home / 2,282.45-3,423.40-639.12

Finding the Fourth Proportional to 2,282.45, 3,423.40 and 639.12

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Solution

The fourth proportional to 2,282.45, 3,423.40 and 639.12 is: 958.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,282.45 : 3,423.40 = 639.12 : x
  2. Step 2: Convert to fraction form
    2,282.45/3,423.40 = 639.12/x
  3. Step 3: Cross multiply
    2,282.45x = 3,423.40 × 639.12
  4. Step 4: Simplify right side
    2,282.45x = 2,187,963.41
  5. Step 5: Solve for x
    x = 2,187,963.41/2,282.45
  6. Step 6: Final answer
    x = 958.61

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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.