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Finding the Fourth Proportional to 303,659.80, 455,489.70 and 137,447.80

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Solution

The fourth proportional to 303,659.80, 455,489.70 and 137,447.80 is: 206,171.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,659.80 : 455,489.70 = 137,447.80 : x
  2. Step 2: Convert to fraction form
    303,659.80/455,489.70 = 137,447.80/x
  3. Step 3: Cross multiply
    303,659.80x = 455,489.70 × 137,447.80
  4. Step 4: Simplify right side
    303,659.80x = 62,606,057,187.66
  5. Step 5: Solve for x
    x = 62,606,057,187.66/303,659.80
  6. Step 6: Final answer
    x = 206,171.70

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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.