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Finding the Fourth Proportional to 722,189.52, 996,594.12 and 399,874

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Solution

The fourth proportional to 722,189.52, 996,594.12 and 399,874 is: 551,810.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,189.52 : 996,594.12 = 399,874 : x
  2. Step 2: Convert to fraction form
    722,189.52/996,594.12 = 399,874/x
  3. Step 3: Cross multiply
    722,189.52x = 996,594.12 × 399,874
  4. Step 4: Simplify right side
    722,189.52x = 398,512,077,140.88
  5. Step 5: Solve for x
    x = 398,512,077,140.88/722,189.52
  6. Step 6: Final answer
    x = 551,810.94

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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.