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Finding the Fourth Proportional to 275,077.40, 379,606.50 and 154,218.72

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Solution

The fourth proportional to 275,077.40, 379,606.50 and 154,218.72 is: 212,821.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,077.40 : 379,606.50 = 154,218.72 : x
  2. Step 2: Convert to fraction form
    275,077.40/379,606.50 = 154,218.72/x
  3. Step 3: Cross multiply
    275,077.40x = 379,606.50 × 154,218.72
  4. Step 4: Simplify right side
    275,077.40x = 58,542,428,533.68
  5. Step 5: Solve for x
    x = 58,542,428,533.68/275,077.40
  6. Step 6: Final answer
    x = 212,821.66

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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.