Home / 1,811.31-2,716.83-512.75

Finding the Fourth Proportional to 1,811.31, 2,716.83 and 512.75

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Solution

The fourth proportional to 1,811.31, 2,716.83 and 512.75 is: 769.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.31 : 2,716.83 = 512.75 : x
  2. Step 2: Convert to fraction form
    1,811.31/2,716.83 = 512.75/x
  3. Step 3: Cross multiply
    1,811.31x = 2,716.83 × 512.75
  4. Step 4: Simplify right side
    1,811.31x = 1,393,041.00
  5. Step 5: Solve for x
    x = 1,393,041.00/1,811.31
  6. Step 6: Final answer
    x = 769.08

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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.