Home / 1,811.18-2,716.99-640.94

Finding the Fourth Proportional to 1,811.18, 2,716.99 and 640.94

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Solution

The fourth proportional to 1,811.18, 2,716.99 and 640.94 is: 961.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.18 : 2,716.99 = 640.94 : x
  2. Step 2: Convert to fraction form
    1,811.18/2,716.99 = 640.94/x
  3. Step 3: Cross multiply
    1,811.18x = 2,716.99 × 640.94
  4. Step 4: Simplify right side
    1,811.18x = 1,741,424.37
  5. Step 5: Solve for x
    x = 1,741,424.37/1,811.18
  6. Step 6: Final answer
    x = 961.49

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1.5x scale

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.