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Finding the Fourth Proportional to 395,989.20, 593,983.80 and 111,679.20

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Solution

The fourth proportional to 395,989.20, 593,983.80 and 111,679.20 is: 167,518.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,989.20 : 593,983.80 = 111,679.20 : x
  2. Step 2: Convert to fraction form
    395,989.20/593,983.80 = 111,679.20/x
  3. Step 3: Cross multiply
    395,989.20x = 593,983.80 × 111,679.20
  4. Step 4: Simplify right side
    395,989.20x = 66,335,635,596.96
  5. Step 5: Solve for x
    x = 66,335,635,596.96/395,989.20
  6. Step 6: Final answer
    x = 167,518.80

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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.