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Finding the Fourth Proportional to 300,872.88, 451,319.04 and 90,512.64

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Solution

The fourth proportional to 300,872.88, 451,319.04 and 90,512.64 is: 135,771.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,872.88 : 451,319.04 = 90,512.64 : x
  2. Step 2: Convert to fraction form
    300,872.88/451,319.04 = 90,512.64/x
  3. Step 3: Cross multiply
    300,872.88x = 451,319.04 × 90,512.64
  4. Step 4: Simplify right side
    300,872.88x = 40,850,077,792.67
  5. Step 5: Solve for x
    x = 40,850,077,792.67/300,872.88
  6. Step 6: Final answer
    x = 135,771.88

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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.