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Finding the Fourth Proportional to 1,267,786.62, 1,749,542.09 and 687,025.80

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Solution

The fourth proportional to 1,267,786.62, 1,749,542.09 and 687,025.80 is: 948,093.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267,786.62 : 1,749,542.09 = 687,025.80 : x
  2. Step 2: Convert to fraction form
    1,267,786.62/1,749,542.09 = 687,025.80/x
  3. Step 3: Cross multiply
    1,267,786.62x = 1,749,542.09 × 687,025.80
  4. Step 4: Simplify right side
    1,267,786.62x = 1,201,980,550,580.79
  5. Step 5: Solve for x
    x = 1,201,980,550,580.79/1,267,786.62
  6. Step 6: Final answer
    x = 948,093.73

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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.