Home / 1,212.24-1,818.68-518.94

Finding the Fourth Proportional to 1,212.24, 1,818.68 and 518.94

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Solution

The fourth proportional to 1,212.24, 1,818.68 and 518.94 is: 778.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.24 : 1,818.68 = 518.94 : x
  2. Step 2: Convert to fraction form
    1,212.24/1,818.68 = 518.94/x
  3. Step 3: Cross multiply
    1,212.24x = 1,818.68 × 518.94
  4. Step 4: Simplify right side
    1,212.24x = 943,785.80
  5. Step 5: Solve for x
    x = 943,785.80/1,212.24
  6. Step 6: Final answer
    x = 778.55

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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.