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Finding the Fourth Proportional to 643,486.62, 965,231.10 and 264,142.97

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Solution

The fourth proportional to 643,486.62, 965,231.10 and 264,142.97 is: 396,214.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,486.62 : 965,231.10 = 264,142.97 : x
  2. Step 2: Convert to fraction form
    643,486.62/965,231.10 = 264,142.97/x
  3. Step 3: Cross multiply
    643,486.62x = 965,231.10 × 264,142.97
  4. Step 4: Simplify right side
    643,486.62x = 254,959,004,664.21
  5. Step 5: Solve for x
    x = 254,959,004,664.21/643,486.62
  6. Step 6: Final answer
    x = 396,214.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.