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Finding the Fourth Proportional to 618,812.78, 928,483.80 and 259,067.66

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Solution

The fourth proportional to 618,812.78, 928,483.80 and 259,067.66 is: 388,712.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,812.78 : 928,483.80 = 259,067.66 : x
  2. Step 2: Convert to fraction form
    618,812.78/928,483.80 = 259,067.66/x
  3. Step 3: Cross multiply
    618,812.78x = 928,483.80 × 259,067.66
  4. Step 4: Simplify right side
    618,812.78x = 240,540,125,413.91
  5. Step 5: Solve for x
    x = 240,540,125,413.91/618,812.78
  6. Step 6: Final answer
    x = 388,712.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.