Home / 2,100.07-3,150.26-639.23

Finding the Fourth Proportional to 2,100.07, 3,150.26 and 639.23

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Solution

The fourth proportional to 2,100.07, 3,150.26 and 639.23 is: 958.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,100.07 : 3,150.26 = 639.23 : x
  2. Step 2: Convert to fraction form
    2,100.07/3,150.26 = 639.23/x
  3. Step 3: Cross multiply
    2,100.07x = 3,150.26 × 639.23
  4. Step 4: Simplify right side
    2,100.07x = 2,013,724.15
  5. Step 5: Solve for x
    x = 2,013,724.15/2,100.07
  6. Step 6: Final answer
    x = 958.88

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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.