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Finding the Fourth Proportional to 300,918.68, 451,379.64 and 90,555.20

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Solution

The fourth proportional to 300,918.68, 451,379.64 and 90,555.20 is: 135,833.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,918.68 : 451,379.64 = 90,555.20 : x
  2. Step 2: Convert to fraction form
    300,918.68/451,379.64 = 90,555.20/x
  3. Step 3: Cross multiply
    300,918.68x = 451,379.64 × 90,555.20
  4. Step 4: Simplify right side
    300,918.68x = 40,874,773,576.13
  5. Step 5: Solve for x
    x = 40,874,773,576.13/300,918.68
  6. Step 6: Final answer
    x = 135,833.29

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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.