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Finding the Fourth Proportional to 395,138.92, 592,109.70 and 261,540.52

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Solution

The fourth proportional to 395,138.92, 592,109.70 and 261,540.52 is: 391,914.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,138.92 : 592,109.70 = 261,540.52 : x
  2. Step 2: Convert to fraction form
    395,138.92/592,109.70 = 261,540.52/x
  3. Step 3: Cross multiply
    395,138.92x = 592,109.70 × 261,540.52
  4. Step 4: Simplify right side
    395,138.92x = 154,860,678,835.04
  5. Step 5: Solve for x
    x = 154,860,678,835.04/395,138.92
  6. Step 6: Final answer
    x = 391,914.52

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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.