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Finding the Fourth Proportional to 300,616.38, 450,818.10 and 87,339.87

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Solution

The fourth proportional to 300,616.38, 450,818.10 and 87,339.87 is: 130,978.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,616.38 : 450,818.10 = 87,339.87 : x
  2. Step 2: Convert to fraction form
    300,616.38/450,818.10 = 87,339.87/x
  3. Step 3: Cross multiply
    300,616.38x = 450,818.10 × 87,339.87
  4. Step 4: Simplify right side
    300,616.38x = 39,374,394,247.65
  5. Step 5: Solve for x
    x = 39,374,394,247.65/300,616.38
  6. Step 6: Final answer
    x = 130,978.87

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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.