Home / 4,261.20-6,389.62-1,919.20

Finding the Fourth Proportional to 4,261.20, 6,389.62 and 1,919.20

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Solution

The fourth proportional to 4,261.20, 6,389.62 and 1,919.20 is: 2,877.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,261.20 : 6,389.62 = 1,919.20 : x
  2. Step 2: Convert to fraction form
    4,261.20/6,389.62 = 1,919.20/x
  3. Step 3: Cross multiply
    4,261.20x = 6,389.62 × 1,919.20
  4. Step 4: Simplify right side
    4,261.20x = 12,262,958.70
  5. Step 5: Solve for x
    x = 12,262,958.70/4,261.20
  6. Step 6: Final answer
    x = 2,877.82

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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.