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Finding the Fourth Proportional to 721,874.54, 996,174.81 and 399,577.73

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Solution

The fourth proportional to 721,874.54, 996,174.81 and 399,577.73 is: 551,410.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,874.54 : 996,174.81 = 399,577.73 : x
  2. Step 2: Convert to fraction form
    721,874.54/996,174.81 = 399,577.73/x
  3. Step 3: Cross multiply
    721,874.54x = 996,174.81 × 399,577.73
  4. Step 4: Simplify right side
    721,874.54x = 398,049,264,282.11
  5. Step 5: Solve for x
    x = 398,049,264,282.11/721,874.54
  6. Step 6: Final answer
    x = 551,410.59

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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.