Home / 778,834.75-1,074,791.96-421,138.75

Finding the Fourth Proportional to 778,834.75, 1,074,791.96 and 421,138.75

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Solution

The fourth proportional to 778,834.75, 1,074,791.96 and 421,138.75 is: 581,171.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,834.75 : 1,074,791.96 = 421,138.75 : x
  2. Step 2: Convert to fraction form
    778,834.75/1,074,791.96 = 421,138.75/x
  3. Step 3: Cross multiply
    778,834.75x = 1,074,791.96 × 421,138.75
  4. Step 4: Simplify right side
    778,834.75x = 452,636,542,544.45
  5. Step 5: Solve for x
    x = 452,636,542,544.45/778,834.75
  6. Step 6: Final answer
    x = 581,171.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.