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Finding the Fourth Proportional to 722,249.80, 996,703.82 and 399,959.51

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Solution

The fourth proportional to 722,249.80, 996,703.82 and 399,959.51 is: 551,943.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,249.80 : 996,703.82 = 399,959.51 : x
  2. Step 2: Convert to fraction form
    722,249.80/996,703.82 = 399,959.51/x
  3. Step 3: Cross multiply
    722,249.80x = 996,703.82 × 399,959.51
  4. Step 4: Simplify right side
    722,249.80x = 398,641,165,978.86
  5. Step 5: Solve for x
    x = 398,641,165,978.86/722,249.80
  6. Step 6: Final answer
    x = 551,943.62

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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.