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Finding the Fourth Proportional to 721,805.82, 996,066.63 and 399,516.54

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Solution

The fourth proportional to 721,805.82, 996,066.63 and 399,516.54 is: 551,318.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,805.82 : 996,066.63 = 399,516.54 : x
  2. Step 2: Convert to fraction form
    721,805.82/996,066.63 = 399,516.54/x
  3. Step 3: Cross multiply
    721,805.82x = 996,066.63 × 399,516.54
  4. Step 4: Simplify right side
    721,805.82x = 397,945,093,627.06
  5. Step 5: Solve for x
    x = 397,945,093,627.06/721,805.82
  6. Step 6: Final answer
    x = 551,318.77

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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.