Home / 1,221,078.75-1,685,109.74-677,238.27

Finding the Fourth Proportional to 1,221,078.75, 1,685,109.74 and 677,238.27

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Solution

The fourth proportional to 1,221,078.75, 1,685,109.74 and 677,238.27 is: 934,600.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,078.75 : 1,685,109.74 = 677,238.27 : x
  2. Step 2: Convert to fraction form
    1,221,078.75/1,685,109.74 = 677,238.27/x
  3. Step 3: Cross multiply
    1,221,078.75x = 1,685,109.74 × 677,238.27
  4. Step 4: Simplify right side
    1,221,078.75x = 1,141,220,801,691.56
  5. Step 5: Solve for x
    x = 1,141,220,801,691.56/1,221,078.75
  6. Step 6: Final answer
    x = 934,600.49

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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.