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Finding the Fourth Proportional to 722,257.98, 996,717.33 and 399,993.54

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Solution

The fourth proportional to 722,257.98, 996,717.33 and 399,993.54 is: 551,991.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,257.98 : 996,717.33 = 399,993.54 : x
  2. Step 2: Convert to fraction form
    722,257.98/996,717.33 = 399,993.54/x
  3. Step 3: Cross multiply
    722,257.98x = 996,717.33 × 399,993.54
  4. Step 4: Simplify right side
    722,257.98x = 398,680,493,206.05
  5. Step 5: Solve for x
    x = 398,680,493,206.05/722,257.98
  6. Step 6: Final answer
    x = 551,991.81

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Double scale
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Similar ratio
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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.