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Finding the Fourth Proportional to 491,620.40, 737,431.12 and 136,634.48

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Solution

The fourth proportional to 491,620.40, 737,431.12 and 136,634.48 is: 204,951.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,620.40 : 737,431.12 = 136,634.48 : x
  2. Step 2: Convert to fraction form
    491,620.40/737,431.12 = 136,634.48/x
  3. Step 3: Cross multiply
    491,620.40x = 737,431.12 × 136,634.48
  4. Step 4: Simplify right side
    491,620.40x = 100,758,517,617.02
  5. Step 5: Solve for x
    x = 100,758,517,617.02/491,620.40
  6. Step 6: Final answer
    x = 204,951.86

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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.