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Finding the Fourth Proportional to 345,879.85, 515,381.22 and 308,150

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Solution

The fourth proportional to 345,879.85, 515,381.22 and 308,150 is: 459,161.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,879.85 : 515,381.22 = 308,150 : x
  2. Step 2: Convert to fraction form
    345,879.85/515,381.22 = 308,150/x
  3. Step 3: Cross multiply
    345,879.85x = 515,381.22 × 308,150
  4. Step 4: Simplify right side
    345,879.85x = 158,814,722,943
  5. Step 5: Solve for x
    x = 158,814,722,943/345,879.85
  6. Step 6: Final answer
    x = 459,161.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.