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Finding the Fourth Proportional to 663,212.80, 994,819.20 and 219,980.80

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Solution

The fourth proportional to 663,212.80, 994,819.20 and 219,980.80 is: 329,971.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,212.80 : 994,819.20 = 219,980.80 : x
  2. Step 2: Convert to fraction form
    663,212.80/994,819.20 = 219,980.80/x
  3. Step 3: Cross multiply
    663,212.80x = 994,819.20 × 219,980.80
  4. Step 4: Simplify right side
    663,212.80x = 218,841,123,471.36
  5. Step 5: Solve for x
    x = 218,841,123,471.36/663,212.80
  6. Step 6: Final answer
    x = 329,971.20

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.