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Finding the Fourth Proportional to 274,609.50, 378,966.87 and 155,377.50

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Solution

The fourth proportional to 274,609.50, 378,966.87 and 155,377.50 is: 214,424.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,609.50 : 378,966.87 = 155,377.50 : x
  2. Step 2: Convert to fraction form
    274,609.50/378,966.87 = 155,377.50/x
  3. Step 3: Cross multiply
    274,609.50x = 378,966.87 × 155,377.50
  4. Step 4: Simplify right side
    274,609.50x = 58,882,924,843.43
  5. Step 5: Solve for x
    x = 58,882,924,843.43/274,609.50
  6. Step 6: Final answer
    x = 214,424.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.