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Finding the Fourth Proportional to 486,562.15, 671,222.84 and 305,183.31

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Solution

The fourth proportional to 486,562.15, 671,222.84 and 305,183.31 is: 421,006.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,562.15 : 671,222.84 = 305,183.31 : x
  2. Step 2: Convert to fraction form
    486,562.15/671,222.84 = 305,183.31/x
  3. Step 3: Cross multiply
    486,562.15x = 671,222.84 × 305,183.31
  4. Step 4: Simplify right side
    486,562.15x = 204,846,004,015.80
  5. Step 5: Solve for x
    x = 204,846,004,015.80/486,562.15
  6. Step 6: Final answer
    x = 421,006.86

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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.