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Finding the Fourth Proportional to 395,699.78, 593,622.60 and 129,475.22

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Solution

The fourth proportional to 395,699.78, 593,622.60 and 129,475.22 is: 194,236.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,699.78 : 593,622.60 = 129,475.22 : x
  2. Step 2: Convert to fraction form
    395,699.78/593,622.60 = 129,475.22/x
  3. Step 3: Cross multiply
    395,699.78x = 593,622.60 × 129,475.22
  4. Step 4: Simplify right side
    395,699.78x = 76,859,416,731.97
  5. Step 5: Solve for x
    x = 76,859,416,731.97/395,699.78
  6. Step 6: Final answer
    x = 194,236.69

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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.