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Finding the Fourth Proportional to 621,879.32, 858,127.28 and 349,942.48

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Solution

The fourth proportional to 621,879.32, 858,127.28 and 349,942.48 is: 482,883.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,879.32 : 858,127.28 = 349,942.48 : x
  2. Step 2: Convert to fraction form
    621,879.32/858,127.28 = 349,942.48/x
  3. Step 3: Cross multiply
    621,879.32x = 858,127.28 × 349,942.48
  4. Step 4: Simplify right side
    621,879.32x = 300,295,188,518.85
  5. Step 5: Solve for x
    x = 300,295,188,518.85/621,879.32
  6. Step 6: Final answer
    x = 482,883.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.