Home / 3,140.88-4,334.82-2,145.79

Finding the Fourth Proportional to 3,140.88, 4,334.82 and 2,145.79

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Solution

The fourth proportional to 3,140.88, 4,334.82 and 2,145.79 is: 2,961.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.88 : 4,334.82 = 2,145.79 : x
  2. Step 2: Convert to fraction form
    3,140.88/4,334.82 = 2,145.79/x
  3. Step 3: Cross multiply
    3,140.88x = 4,334.82 × 2,145.79
  4. Step 4: Simplify right side
    3,140.88x = 9,301,610.78
  5. Step 5: Solve for x
    x = 9,301,610.78/3,140.88
  6. Step 6: Final answer
    x = 2,961.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.