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Finding the Fourth Proportional to 343,138.20, 515,052.90 and 165,787.80

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Solution

The fourth proportional to 343,138.20, 515,052.90 and 165,787.80 is: 248,848.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,138.20 : 515,052.90 = 165,787.80 : x
  2. Step 2: Convert to fraction form
    343,138.20/515,052.90 = 165,787.80/x
  3. Step 3: Cross multiply
    343,138.20x = 515,052.90 × 165,787.80
  4. Step 4: Simplify right side
    343,138.20x = 85,389,487,174.62
  5. Step 5: Solve for x
    x = 85,389,487,174.62/343,138.20
  6. Step 6: Final answer
    x = 248,848.68

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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.