Home / 2,489.18-3,728.91-1,909.22

Finding the Fourth Proportional to 2,489.18, 3,728.91 and 1,909.22

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Solution

The fourth proportional to 2,489.18, 3,728.91 and 1,909.22 is: 2,860.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.18 : 3,728.91 = 1,909.22 : x
  2. Step 2: Convert to fraction form
    2,489.18/3,728.91 = 1,909.22/x
  3. Step 3: Cross multiply
    2,489.18x = 3,728.91 × 1,909.22
  4. Step 4: Simplify right side
    2,489.18x = 7,119,309.55
  5. Step 5: Solve for x
    x = 7,119,309.55/2,489.18
  6. Step 6: Final answer
    x = 2,860.10

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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.