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Finding the Fourth Proportional to 722,203.59, 996,640.34 and 399,913.68

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Solution

The fourth proportional to 722,203.59, 996,640.34 and 399,913.68 is: 551,880.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,203.59 : 996,640.34 = 399,913.68 : x
  2. Step 2: Convert to fraction form
    722,203.59/996,640.34 = 399,913.68/x
  3. Step 3: Cross multiply
    722,203.59x = 996,640.34 × 399,913.68
  4. Step 4: Simplify right side
    722,203.59x = 398,570,106,005.85
  5. Step 5: Solve for x
    x = 398,570,106,005.85/722,203.59
  6. Step 6: Final answer
    x = 551,880.54

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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.