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Finding the Fourth Proportional to 617,279.87, 851,879.31 and 345,331.55

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Solution

The fourth proportional to 617,279.87, 851,879.31 and 345,331.55 is: 476,576.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,279.87 : 851,879.31 = 345,331.55 : x
  2. Step 2: Convert to fraction form
    617,279.87/851,879.31 = 345,331.55/x
  3. Step 3: Cross multiply
    617,279.87x = 851,879.31 × 345,331.55
  4. Step 4: Simplify right side
    617,279.87x = 294,180,802,535.23
  5. Step 5: Solve for x
    x = 294,180,802,535.23/617,279.87
  6. Step 6: Final answer
    x = 476,576.05

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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.