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Finding the Fourth Proportional to 397,329.50, 548,314.80 and 218,481.50

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Solution

The fourth proportional to 397,329.50, 548,314.80 and 218,481.50 is: 301,504.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,329.50 : 548,314.80 = 218,481.50 : x
  2. Step 2: Convert to fraction form
    397,329.50/548,314.80 = 218,481.50/x
  3. Step 3: Cross multiply
    397,329.50x = 548,314.80 × 218,481.50
  4. Step 4: Simplify right side
    397,329.50x = 119,796,639,976.20
  5. Step 5: Solve for x
    x = 119,796,639,976.20/397,329.50
  6. Step 6: Final answer
    x = 301,504.52

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1.5x scale

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.