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Finding the Fourth Proportional to 548,912.70, 757,964.52 and 345,029.28

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Solution

The fourth proportional to 548,912.70, 757,964.52 and 345,029.28 is: 476,432.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,912.70 : 757,964.52 = 345,029.28 : x
  2. Step 2: Convert to fraction form
    548,912.70/757,964.52 = 345,029.28/x
  3. Step 3: Cross multiply
    548,912.70x = 757,964.52 × 345,029.28
  4. Step 4: Simplify right side
    548,912.70x = 261,519,952,601.15
  5. Step 5: Solve for x
    x = 261,519,952,601.15/548,912.70
  6. Step 6: Final answer
    x = 476,432.69

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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.