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Finding the Fourth Proportional to 275,074.59, 379,621.20 and 154,223.71

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Solution

The fourth proportional to 275,074.59, 379,621.20 and 154,223.71 is: 212,838.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,074.59 : 379,621.20 = 154,223.71 : x
  2. Step 2: Convert to fraction form
    275,074.59/379,621.20 = 154,223.71/x
  3. Step 3: Cross multiply
    275,074.59x = 379,621.20 × 154,223.71
  4. Step 4: Simplify right side
    275,074.59x = 58,546,588,620.43
  5. Step 5: Solve for x
    x = 58,546,588,620.43/275,074.59
  6. Step 6: Final answer
    x = 212,838.95

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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.