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Finding the Fourth Proportional to 395,402.85, 593,181.73 and 129,091.86

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Solution

The fourth proportional to 395,402.85, 593,181.73 and 129,091.86 is: 193,663.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,402.85 : 593,181.73 = 129,091.86 : x
  2. Step 2: Convert to fraction form
    395,402.85/593,181.73 = 129,091.86/x
  3. Step 3: Cross multiply
    395,402.85x = 593,181.73 × 129,091.86
  4. Step 4: Simplify right side
    395,402.85x = 76,574,933,005.08
  5. Step 5: Solve for x
    x = 76,574,933,005.08/395,402.85
  6. Step 6: Final answer
    x = 193,663.08

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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.