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Finding the Fourth Proportional to 722,091.69, 996,517.68 and 399,801.79

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Solution

The fourth proportional to 722,091.69, 996,517.68 and 399,801.79 is: 551,743.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,091.69 : 996,517.68 = 399,801.79 : x
  2. Step 2: Convert to fraction form
    722,091.69/996,517.68 = 399,801.79/x
  3. Step 3: Cross multiply
    722,091.69x = 996,517.68 × 399,801.79
  4. Step 4: Simplify right side
    722,091.69x = 398,409,552,230.65
  5. Step 5: Solve for x
    x = 398,409,552,230.65/722,091.69
  6. Step 6: Final answer
    x = 551,743.72

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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.