Home / 2,199.18-3,299.32-639.14

Finding the Fourth Proportional to 2,199.18, 3,299.32 and 639.14

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Solution

The fourth proportional to 2,199.18, 3,299.32 and 639.14 is: 958.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,199.18 : 3,299.32 = 639.14 : x
  2. Step 2: Convert to fraction form
    2,199.18/3,299.32 = 639.14/x
  3. Step 3: Cross multiply
    2,199.18x = 3,299.32 × 639.14
  4. Step 4: Simplify right side
    2,199.18x = 2,108,729.35
  5. Step 5: Solve for x
    x = 2,108,729.35/2,199.18
  6. Step 6: Final answer
    x = 958.87

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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.