Home / 1,387,212.75-2,080,819.13-389,940.75

Finding the Fourth Proportional to 1,387,212.75, 2,080,819.13 and 389,940.75

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Solution

The fourth proportional to 1,387,212.75, 2,080,819.13 and 389,940.75 is: 584,911.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,212.75 : 2,080,819.13 = 389,940.75 : x
  2. Step 2: Convert to fraction form
    1,387,212.75/2,080,819.13 = 389,940.75/x
  3. Step 3: Cross multiply
    1,387,212.75x = 2,080,819.13 × 389,940.75
  4. Step 4: Simplify right side
    1,387,212.75x = 811,396,170,216.84
  5. Step 5: Solve for x
    x = 811,396,170,216.84/1,387,212.75
  6. Step 6: Final answer
    x = 584,911.13

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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.