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Finding the Fourth Proportional to 395,099.65, 592,589.31 and 128,859.73

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Solution

The fourth proportional to 395,099.65, 592,589.31 and 128,859.73 is: 193,269.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,099.65 : 592,589.31 = 128,859.73 : x
  2. Step 2: Convert to fraction form
    395,099.65/592,589.31 = 128,859.73/x
  3. Step 3: Cross multiply
    395,099.65x = 592,589.31 × 128,859.73
  4. Step 4: Simplify right side
    395,099.65x = 76,360,898,487.49
  5. Step 5: Solve for x
    x = 76,360,898,487.49/395,099.65
  6. Step 6: Final answer
    x = 193,269.97

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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.