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Finding the Fourth Proportional to 339,997.40, 509,558.70 and 206,736.20

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Solution

The fourth proportional to 339,997.40, 509,558.70 and 206,736.20 is: 309,838.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,997.40 : 509,558.70 = 206,736.20 : x
  2. Step 2: Convert to fraction form
    339,997.40/509,558.70 = 206,736.20/x
  3. Step 3: Cross multiply
    339,997.40x = 509,558.70 × 206,736.20
  4. Step 4: Simplify right side
    339,997.40x = 105,344,229,314.94
  5. Step 5: Solve for x
    x = 105,344,229,314.94/339,997.40
  6. Step 6: Final answer
    x = 309,838.34

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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.