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Finding the Fourth Proportional to 395,793.72, 593,633.16 and 129,564.78

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Solution

The fourth proportional to 395,793.72, 593,633.16 and 129,564.78 is: 194,328.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,793.72 : 593,633.16 = 129,564.78 : x
  2. Step 2: Convert to fraction form
    395,793.72/593,633.16 = 129,564.78/x
  3. Step 3: Cross multiply
    395,793.72x = 593,633.16 × 129,564.78
  4. Step 4: Simplify right side
    395,793.72x = 76,913,949,776.10
  5. Step 5: Solve for x
    x = 76,913,949,776.10/395,793.72
  6. Step 6: Final answer
    x = 194,328.37

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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.