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Finding the Fourth Proportional to 321,928.72, 482,939.16 and 100,330

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Solution

The fourth proportional to 321,928.72, 482,939.16 and 100,330 is: 150,509.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,928.72 : 482,939.16 = 100,330 : x
  2. Step 2: Convert to fraction form
    321,928.72/482,939.16 = 100,330/x
  3. Step 3: Cross multiply
    321,928.72x = 482,939.16 × 100,330
  4. Step 4: Simplify right side
    321,928.72x = 48,453,285,922.80
  5. Step 5: Solve for x
    x = 48,453,285,922.80/321,928.72
  6. Step 6: Final answer
    x = 150,509.36

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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.