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Finding the Fourth Proportional to 300,635.36, 451,022.16 and 90,277.28

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Solution

The fourth proportional to 300,635.36, 451,022.16 and 90,277.28 is: 135,436.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,635.36 : 451,022.16 = 90,277.28 : x
  2. Step 2: Convert to fraction form
    300,635.36/451,022.16 = 90,277.28/x
  3. Step 3: Cross multiply
    300,635.36x = 451,022.16 × 90,277.28
  4. Step 4: Simplify right side
    300,635.36x = 40,717,053,824.52
  5. Step 5: Solve for x
    x = 40,717,053,824.52/300,635.36
  6. Step 6: Final answer
    x = 135,436.68

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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.