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Finding the Fourth Proportional to 422,668.43, 583,304.78 and 231,689.87

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Solution

The fourth proportional to 422,668.43, 583,304.78 and 231,689.87 is: 319,744.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,668.43 : 583,304.78 = 231,689.87 : x
  2. Step 2: Convert to fraction form
    422,668.43/583,304.78 = 231,689.87/x
  3. Step 3: Cross multiply
    422,668.43x = 583,304.78 × 231,689.87
  4. Step 4: Simplify right side
    422,668.43x = 135,145,806,311.28
  5. Step 5: Solve for x
    x = 135,145,806,311.28/422,668.43
  6. Step 6: Final answer
    x = 319,744.27

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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.