Home / 1,213.07-1,819.59-519.15

Finding the Fourth Proportional to 1,213.07, 1,819.59 and 519.15

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Solution

The fourth proportional to 1,213.07, 1,819.59 and 519.15 is: 778.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.07 : 1,819.59 = 519.15 : x
  2. Step 2: Convert to fraction form
    1,213.07/1,819.59 = 519.15/x
  3. Step 3: Cross multiply
    1,213.07x = 1,819.59 × 519.15
  4. Step 4: Simplify right side
    1,213.07x = 944,628.45
  5. Step 5: Solve for x
    x = 944,628.45/1,213.07
  6. Step 6: Final answer
    x = 778.71

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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.