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Finding the Fourth Proportional to 303,638.20, 455,473.88 and 126,163.16

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Solution

The fourth proportional to 303,638.20, 455,473.88 and 126,163.16 is: 189,251.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,638.20 : 455,473.88 = 126,163.16 : x
  2. Step 2: Convert to fraction form
    303,638.20/455,473.88 = 126,163.16/x
  3. Step 3: Cross multiply
    303,638.20x = 455,473.88 × 126,163.16
  4. Step 4: Simplify right side
    303,638.20x = 57,464,023,998.26
  5. Step 5: Solve for x
    x = 57,464,023,998.26/303,638.20
  6. Step 6: Final answer
    x = 189,251.63

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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.