Home / 721,881.06-996,183.78-399,584.22

Finding the Fourth Proportional to 721,881.06, 996,183.78 and 399,584.22

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Solution

The fourth proportional to 721,881.06, 996,183.78 and 399,584.22 is: 551,419.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,881.06 : 996,183.78 = 399,584.22 : x
  2. Step 2: Convert to fraction form
    721,881.06/996,183.78 = 399,584.22/x
  3. Step 3: Cross multiply
    721,881.06x = 996,183.78 × 399,584.22
  4. Step 4: Simplify right side
    721,881.06x = 398,059,318,707.95
  5. Step 5: Solve for x
    x = 398,059,318,707.95/721,881.06
  6. Step 6: Final answer
    x = 551,419.54

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Double scale
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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.