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Finding the Fourth Proportional to 387,063.37, 580,299.57 and 218,773.72

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Solution

The fourth proportional to 387,063.37, 580,299.57 and 218,773.72 is: 327,993.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,063.37 : 580,299.57 = 218,773.72 : x
  2. Step 2: Convert to fraction form
    387,063.37/580,299.57 = 218,773.72/x
  3. Step 3: Cross multiply
    387,063.37x = 580,299.57 × 218,773.72
  4. Step 4: Simplify right side
    387,063.37x = 126,954,295,643.30
  5. Step 5: Solve for x
    x = 126,954,295,643.30/387,063.37
  6. Step 6: Final answer
    x = 327,993.57

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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.