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Finding the Fourth Proportional to 722,205.11, 996,630.80 and 399,908.29

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Solution

The fourth proportional to 722,205.11, 996,630.80 and 399,908.29 is: 551,866.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,205.11 : 996,630.80 = 399,908.29 : x
  2. Step 2: Convert to fraction form
    722,205.11/996,630.80 = 399,908.29/x
  3. Step 3: Cross multiply
    722,205.11x = 996,630.80 × 399,908.29
  4. Step 4: Simplify right side
    722,205.11x = 398,560,918,989.33
  5. Step 5: Solve for x
    x = 398,560,918,989.33/722,205.11
  6. Step 6: Final answer
    x = 551,866.66

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1.5x scale

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.