Home / 722,218.11-996,648.72-399,921.33

Finding the Fourth Proportional to 722,218.11, 996,648.72 and 399,921.33

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Solution

The fourth proportional to 722,218.11, 996,648.72 and 399,921.33 is: 551,884.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,218.11 : 996,648.72 = 399,921.33 : x
  2. Step 2: Convert to fraction form
    722,218.11/996,648.72 = 399,921.33/x
  3. Step 3: Cross multiply
    722,218.11x = 996,648.72 × 399,921.33
  4. Step 4: Simplify right side
    722,218.11x = 398,581,081,645.20
  5. Step 5: Solve for x
    x = 398,581,081,645.20/722,218.11
  6. Step 6: Final answer
    x = 551,884.64

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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.