Home / 2,100.14-3,150.11-639.24

Finding the Fourth Proportional to 2,100.14, 3,150.11 and 639.24

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Solution

The fourth proportional to 2,100.14, 3,150.11 and 639.24 is: 958.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,100.14 : 3,150.11 = 639.24 : x
  2. Step 2: Convert to fraction form
    2,100.14/3,150.11 = 639.24/x
  3. Step 3: Cross multiply
    2,100.14x = 3,150.11 × 639.24
  4. Step 4: Simplify right side
    2,100.14x = 2,013,673.12
  5. Step 5: Solve for x
    x = 2,013,673.12/2,100.14
  6. Step 6: Final answer
    x = 958.83

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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.