Home / 419,722.30-629,769.35-219,995.20

Finding the Fourth Proportional to 419,722.30, 629,769.35 and 219,995.20

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Solution

The fourth proportional to 419,722.30, 629,769.35 and 219,995.20 is: 330,090.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,722.30 : 629,769.35 = 219,995.20 : x
  2. Step 2: Convert to fraction form
    419,722.30/629,769.35 = 219,995.20/x
  3. Step 3: Cross multiply
    419,722.30x = 629,769.35 × 219,995.20
  4. Step 4: Simplify right side
    419,722.30x = 138,546,234,107.12
  5. Step 5: Solve for x
    x = 138,546,234,107.12/419,722.30
  6. Step 6: Final answer
    x = 330,090.24

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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.