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Finding the Fourth Proportional to 722,162.32, 996,571.02 and 399,871.42

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Solution

The fourth proportional to 722,162.32, 996,571.02 and 399,871.42 is: 551,815.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,162.32 : 996,571.02 = 399,871.42 : x
  2. Step 2: Convert to fraction form
    722,162.32/996,571.02 = 399,871.42/x
  3. Step 3: Cross multiply
    722,162.32x = 996,571.02 × 399,871.42
  4. Step 4: Simplify right side
    722,162.32x = 398,500,268,898.25
  5. Step 5: Solve for x
    x = 398,500,268,898.25/722,162.32
  6. Step 6: Final answer
    x = 551,815.37

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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.