Home / 1,811.12-2,716.91-512.61

Finding the Fourth Proportional to 1,811.12, 2,716.91 and 512.61

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Solution

The fourth proportional to 1,811.12, 2,716.91 and 512.61 is: 768.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.12 : 2,716.91 = 512.61 : x
  2. Step 2: Convert to fraction form
    1,811.12/2,716.91 = 512.61/x
  3. Step 3: Cross multiply
    1,811.12x = 2,716.91 × 512.61
  4. Step 4: Simplify right side
    1,811.12x = 1,392,712.67
  5. Step 5: Solve for x
    x = 1,392,712.67/1,811.12
  6. Step 6: Final answer
    x = 768.98

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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.