Home / 1,212.70-1,819.47-519.34

Finding the Fourth Proportional to 1,212.70, 1,819.47 and 519.34

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Solution

The fourth proportional to 1,212.70, 1,819.47 and 519.34 is: 779.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.70 : 1,819.47 = 519.34 : x
  2. Step 2: Convert to fraction form
    1,212.70/1,819.47 = 519.34/x
  3. Step 3: Cross multiply
    1,212.70x = 1,819.47 × 519.34
  4. Step 4: Simplify right side
    1,212.70x = 944,923.55
  5. Step 5: Solve for x
    x = 944,923.55/1,212.70
  6. Step 6: Final answer
    x = 779.19

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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.