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Finding the Fourth Proportional to 300,469.59, 450,748.79 and 87,209.87

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Solution

The fourth proportional to 300,469.59, 450,748.79 and 87,209.87 is: 130,827.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,469.59 : 450,748.79 = 87,209.87 : x
  2. Step 2: Convert to fraction form
    300,469.59/450,748.79 = 87,209.87/x
  3. Step 3: Cross multiply
    300,469.59x = 450,748.79 × 87,209.87
  4. Step 4: Simplify right side
    300,469.59x = 39,309,741,261.08
  5. Step 5: Solve for x
    x = 39,309,741,261.08/300,469.59
  6. Step 6: Final answer
    x = 130,827.69

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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.