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Finding the Fourth Proportional to 408,793.26, 613,288.04 and 128,310.51

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Solution

The fourth proportional to 408,793.26, 613,288.04 and 128,310.51 is: 192,496.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,793.26 : 613,288.04 = 128,310.51 : x
  2. Step 2: Convert to fraction form
    408,793.26/613,288.04 = 128,310.51/x
  3. Step 3: Cross multiply
    408,793.26x = 613,288.04 × 128,310.51
  4. Step 4: Simplify right side
    408,793.26x = 78,691,300,547.75
  5. Step 5: Solve for x
    x = 78,691,300,547.75/408,793.26
  6. Step 6: Final answer
    x = 192,496.57

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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.