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Finding the Fourth Proportional to 620,226.88, 855,992.48 and 378,458.28

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Solution

The fourth proportional to 620,226.88, 855,992.48 and 378,458.28 is: 522,320.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,226.88 : 855,992.48 = 378,458.28 : x
  2. Step 2: Convert to fraction form
    620,226.88/855,992.48 = 378,458.28/x
  3. Step 3: Cross multiply
    620,226.88x = 855,992.48 × 378,458.28
  4. Step 4: Simplify right side
    620,226.88x = 323,957,441,673.73
  5. Step 5: Solve for x
    x = 323,957,441,673.73/620,226.88
  6. Step 6: Final answer
    x = 522,320.87

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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.