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Finding the Fourth Proportional to 722,208.37, 996,635.29 and 399,911.55

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Solution

The fourth proportional to 722,208.37, 996,635.29 and 399,911.55 is: 551,871.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,208.37 : 996,635.29 = 399,911.55 : x
  2. Step 2: Convert to fraction form
    722,208.37/996,635.29 = 399,911.55/x
  3. Step 3: Cross multiply
    722,208.37x = 996,635.29 × 399,911.55
  4. Step 4: Simplify right side
    722,208.37x = 398,565,959,621.27
  5. Step 5: Solve for x
    x = 398,565,959,621.27/722,208.37
  6. Step 6: Final answer
    x = 551,871.14

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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.