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Finding the Fourth Proportional to 722,188.87, 996,608.43 and 399,892.05

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Solution

The fourth proportional to 722,188.87, 996,608.43 and 399,892.05 is: 551,844.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,188.87 : 996,608.43 = 399,892.05 : x
  2. Step 2: Convert to fraction form
    722,188.87/996,608.43 = 399,892.05/x
  3. Step 3: Cross multiply
    722,188.87x = 996,608.43 × 399,892.05
  4. Step 4: Simplify right side
    722,188.87x = 398,535,786,441.72
  5. Step 5: Solve for x
    x = 398,535,786,441.72/722,188.87
  6. Step 6: Final answer
    x = 551,844.27

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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.