Home / 3,191-4,784.20-2,148.42

Finding the Fourth Proportional to 3,191, 4,784.20 and 2,148.42

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Solution

The fourth proportional to 3,191, 4,784.20 and 2,148.42 is: 3,221.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,191 : 4,784.20 = 2,148.42 : x
  2. Step 2: Convert to fraction form
    3,191/4,784.20 = 2,148.42/x
  3. Step 3: Cross multiply
    3,191x = 4,784.20 × 2,148.42
  4. Step 4: Simplify right side
    3,191x = 10,278,470.96
  5. Step 5: Solve for x
    x = 10,278,470.96/3,191
  6. Step 6: Final answer
    x = 3,221.08

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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.