Home / 4,218.20-6,331.35-2,140.55

Finding the Fourth Proportional to 4,218.20, 6,331.35 and 2,140.55

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Solution

The fourth proportional to 4,218.20, 6,331.35 and 2,140.55 is: 3,212.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,218.20 : 6,331.35 = 2,140.55 : x
  2. Step 2: Convert to fraction form
    4,218.20/6,331.35 = 2,140.55/x
  3. Step 3: Cross multiply
    4,218.20x = 6,331.35 × 2,140.55
  4. Step 4: Simplify right side
    4,218.20x = 13,552,571.24
  5. Step 5: Solve for x
    x = 13,552,571.24/4,218.20
  6. Step 6: Final answer
    x = 3,212.88

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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.