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Finding the Fourth Proportional to 422,662.32, 633,842.82 and 138,284.28

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Solution

The fourth proportional to 422,662.32, 633,842.82 and 138,284.28 is: 207,377.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,662.32 : 633,842.82 = 138,284.28 : x
  2. Step 2: Convert to fraction form
    422,662.32/633,842.82 = 138,284.28/x
  3. Step 3: Cross multiply
    422,662.32x = 633,842.82 × 138,284.28
  4. Step 4: Simplify right side
    422,662.32x = 87,650,497,996.87
  5. Step 5: Solve for x
    x = 87,650,497,996.87/422,662.32
  6. Step 6: Final answer
    x = 207,377.13

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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.