Home / 431,990.20-647,693.70-229,619.80

Finding the Fourth Proportional to 431,990.20, 647,693.70 and 229,619.80

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Solution

The fourth proportional to 431,990.20, 647,693.70 and 229,619.80 is: 344,274.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,990.20 : 647,693.70 = 229,619.80 : x
  2. Step 2: Convert to fraction form
    431,990.20/647,693.70 = 229,619.80/x
  3. Step 3: Cross multiply
    431,990.20x = 647,693.70 × 229,619.80
  4. Step 4: Simplify right side
    431,990.20x = 148,723,297,855.26
  5. Step 5: Solve for x
    x = 148,723,297,855.26/431,990.20
  6. Step 6: Final answer
    x = 344,274.70

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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.