Home / 1,291,121.67-1,936,790.91-392,571.21

Finding the Fourth Proportional to 1,291,121.67, 1,936,790.91 and 392,571.21

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Solution

The fourth proportional to 1,291,121.67, 1,936,790.91 and 392,571.21 is: 588,889.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,121.67 : 1,936,790.91 = 392,571.21 : x
  2. Step 2: Convert to fraction form
    1,291,121.67/1,936,790.91 = 392,571.21/x
  3. Step 3: Cross multiply
    1,291,121.67x = 1,936,790.91 × 392,571.21
  4. Step 4: Simplify right side
    1,291,121.67x = 760,328,351,055.70
  5. Step 5: Solve for x
    x = 760,328,351,055.70/1,291,121.67
  6. Step 6: Final answer
    x = 588,889.78

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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.