Home / 4,278.20-6,405.72-2,221.88

Finding the Fourth Proportional to 4,278.20, 6,405.72 and 2,221.88

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Solution

The fourth proportional to 4,278.20, 6,405.72 and 2,221.88 is: 3,326.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,278.20 : 6,405.72 = 2,221.88 : x
  2. Step 2: Convert to fraction form
    4,278.20/6,405.72 = 2,221.88/x
  3. Step 3: Cross multiply
    4,278.20x = 6,405.72 × 2,221.88
  4. Step 4: Simplify right side
    4,278.20x = 14,232,741.15
  5. Step 5: Solve for x
    x = 14,232,741.15/4,278.20
  6. Step 6: Final answer
    x = 3,326.81

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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.