Home / 2,191.86-3,289.41-1,645.11

Finding the Fourth Proportional to 2,191.86, 3,289.41 and 1,645.11

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Solution

The fourth proportional to 2,191.86, 3,289.41 and 1,645.11 is: 2,468.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.86 : 3,289.41 = 1,645.11 : x
  2. Step 2: Convert to fraction form
    2,191.86/3,289.41 = 1,645.11/x
  3. Step 3: Cross multiply
    2,191.86x = 3,289.41 × 1,645.11
  4. Step 4: Simplify right side
    2,191.86x = 5,411,441.29
  5. Step 5: Solve for x
    x = 5,411,441.29/2,191.86
  6. Step 6: Final answer
    x = 2,468.88

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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.