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Finding the Fourth Proportional to 300,611.82, 450,869.13 and 90,212.70

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Solution

The fourth proportional to 300,611.82, 450,869.13 and 90,212.70 is: 135,304.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,611.82 : 450,869.13 = 90,212.70 : x
  2. Step 2: Convert to fraction form
    300,611.82/450,869.13 = 90,212.70/x
  3. Step 3: Cross multiply
    300,611.82x = 450,869.13 × 90,212.70
  4. Step 4: Simplify right side
    300,611.82x = 40,674,121,563.95
  5. Step 5: Solve for x
    x = 40,674,121,563.95/300,611.82
  6. Step 6: Final answer
    x = 135,304.47

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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.