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Finding the Fourth Proportional to 395,517.60, 593,215.65 and 129,279.51

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Solution

The fourth proportional to 395,517.60, 593,215.65 and 129,279.51 is: 193,899.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,517.60 : 593,215.65 = 129,279.51 : x
  2. Step 2: Convert to fraction form
    395,517.60/593,215.65 = 129,279.51/x
  3. Step 3: Cross multiply
    395,517.60x = 593,215.65 × 129,279.51
  4. Step 4: Simplify right side
    395,517.60x = 76,690,628,556.33
  5. Step 5: Solve for x
    x = 76,690,628,556.33/395,517.60
  6. Step 6: Final answer
    x = 193,899.41

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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.