Home / 2,125.90-3,185.75-938.49

Finding the Fourth Proportional to 2,125.90, 3,185.75 and 938.49

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Solution

The fourth proportional to 2,125.90, 3,185.75 and 938.49 is: 1,406.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.90 : 3,185.75 = 938.49 : x
  2. Step 2: Convert to fraction form
    2,125.90/3,185.75 = 938.49/x
  3. Step 3: Cross multiply
    2,125.90x = 3,185.75 × 938.49
  4. Step 4: Simplify right side
    2,125.90x = 2,989,794.52
  5. Step 5: Solve for x
    x = 2,989,794.52/2,125.90
  6. Step 6: Final answer
    x = 1,406.37

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1.5x scale

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.