Home / 1,811.14-2,716.81-512.71

Finding the Fourth Proportional to 1,811.14, 2,716.81 and 512.71

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Solution

The fourth proportional to 1,811.14, 2,716.81 and 512.71 is: 769.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.14 : 2,716.81 = 512.71 : x
  2. Step 2: Convert to fraction form
    1,811.14/2,716.81 = 512.71/x
  3. Step 3: Cross multiply
    1,811.14x = 2,716.81 × 512.71
  4. Step 4: Simplify right side
    1,811.14x = 1,392,935.66
  5. Step 5: Solve for x
    x = 1,392,935.66/1,811.14
  6. Step 6: Final answer
    x = 769.09

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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.