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Finding the Fourth Proportional to 620,005.25, 855,578.10 and 344,380.97

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Solution

The fourth proportional to 620,005.25, 855,578.10 and 344,380.97 is: 475,229.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,005.25 : 855,578.10 = 344,380.97 : x
  2. Step 2: Convert to fraction form
    620,005.25/855,578.10 = 344,380.97/x
  3. Step 3: Cross multiply
    620,005.25x = 855,578.10 × 344,380.97
  4. Step 4: Simplify right side
    620,005.25x = 294,644,815,988.76
  5. Step 5: Solve for x
    x = 294,644,815,988.76/620,005.25
  6. Step 6: Final answer
    x = 475,229.55

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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.