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Finding the Fourth Proportional to 303,781.40, 455,234.70 and 135,163.70

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Solution

The fourth proportional to 303,781.40, 455,234.70 and 135,163.70 is: 202,550.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,781.40 : 455,234.70 = 135,163.70 : x
  2. Step 2: Convert to fraction form
    303,781.40/455,234.70 = 135,163.70/x
  3. Step 3: Cross multiply
    303,781.40x = 455,234.70 × 135,163.70
  4. Step 4: Simplify right side
    303,781.40x = 61,531,206,420.39
  5. Step 5: Solve for x
    x = 61,531,206,420.39/303,781.40
  6. Step 6: Final answer
    x = 202,550.93

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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.