Home / 2,811.78-4,215.24-1,716.12

Finding the Fourth Proportional to 2,811.78, 4,215.24 and 1,716.12

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Solution

The fourth proportional to 2,811.78, 4,215.24 and 1,716.12 is: 2,572.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.78 : 4,215.24 = 1,716.12 : x
  2. Step 2: Convert to fraction form
    2,811.78/4,215.24 = 1,716.12/x
  3. Step 3: Cross multiply
    2,811.78x = 4,215.24 × 1,716.12
  4. Step 4: Simplify right side
    2,811.78x = 7,233,857.67
  5. Step 5: Solve for x
    x = 7,233,857.67/2,811.78
  6. Step 6: Final answer
    x = 2,572.70

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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.