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Finding the Fourth Proportional to 339,377.29, 509,131.63 and 128,998.83

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Solution

The fourth proportional to 339,377.29, 509,131.63 and 128,998.83 is: 193,523.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,377.29 : 509,131.63 = 128,998.83 : x
  2. Step 2: Convert to fraction form
    339,377.29/509,131.63 = 128,998.83/x
  3. Step 3: Cross multiply
    339,377.29x = 509,131.63 × 128,998.83
  4. Step 4: Simplify right side
    339,377.29x = 65,677,383,067.00
  5. Step 5: Solve for x
    x = 65,677,383,067.00/339,377.29
  6. Step 6: Final answer
    x = 193,523.21

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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.