Home / 1,911.82-2,861-1,171.20

Finding the Fourth Proportional to 1,911.82, 2,861 and 1,171.20

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Solution

The fourth proportional to 1,911.82, 2,861 and 1,171.20 is: 1,752.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.82 : 2,861 = 1,171.20 : x
  2. Step 2: Convert to fraction form
    1,911.82/2,861 = 1,171.20/x
  3. Step 3: Cross multiply
    1,911.82x = 2,861 × 1,171.20
  4. Step 4: Simplify right side
    1,911.82x = 3,350,803.20
  5. Step 5: Solve for x
    x = 3,350,803.20/1,911.82
  6. Step 6: Final answer
    x = 1,752.68

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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.