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Finding the Fourth Proportional to 300,756.25, 451,134.38 and 90,394.39

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Solution

The fourth proportional to 300,756.25, 451,134.38 and 90,394.39 is: 135,591.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,756.25 : 451,134.38 = 90,394.39 : x
  2. Step 2: Convert to fraction form
    300,756.25/451,134.38 = 90,394.39/x
  3. Step 3: Cross multiply
    300,756.25x = 451,134.38 × 90,394.39
  4. Step 4: Simplify right side
    300,756.25x = 40,780,016,636.16
  5. Step 5: Solve for x
    x = 40,780,016,636.16/300,756.25
  6. Step 6: Final answer
    x = 135,591.59

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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.