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Finding the Fourth Proportional to 311,945.92, 467,919 and 87,339.48

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Solution

The fourth proportional to 311,945.92, 467,919 and 87,339.48 is: 131,009.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,945.92 : 467,919 = 87,339.48 : x
  2. Step 2: Convert to fraction form
    311,945.92/467,919 = 87,339.48/x
  3. Step 3: Cross multiply
    311,945.92x = 467,919 × 87,339.48
  4. Step 4: Simplify right side
    311,945.92x = 40,867,802,142.12
  5. Step 5: Solve for x
    x = 40,867,802,142.12/311,945.92
  6. Step 6: Final answer
    x = 131,009.25

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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.