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Finding the Fourth Proportional to 399,278.69, 551,067.86 and 253,932.93

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Solution

The fourth proportional to 399,278.69, 551,067.86 and 253,932.93 is: 350,467.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,278.69 : 551,067.86 = 253,932.93 : x
  2. Step 2: Convert to fraction form
    399,278.69/551,067.86 = 253,932.93/x
  3. Step 3: Cross multiply
    399,278.69x = 551,067.86 × 253,932.93
  4. Step 4: Simplify right side
    399,278.69x = 139,934,275,048.97
  5. Step 5: Solve for x
    x = 139,934,275,048.97/399,278.69
  6. Step 6: Final answer
    x = 350,467.68

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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.