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Finding the Fourth Proportional to 321,838.20, 482,757.30 and 85,204.80

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Solution

The fourth proportional to 321,838.20, 482,757.30 and 85,204.80 is: 127,807.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,838.20 : 482,757.30 = 85,204.80 : x
  2. Step 2: Convert to fraction form
    321,838.20/482,757.30 = 85,204.80/x
  3. Step 3: Cross multiply
    321,838.20x = 482,757.30 × 85,204.80
  4. Step 4: Simplify right side
    321,838.20x = 41,133,239,195.04
  5. Step 5: Solve for x
    x = 41,133,239,195.04/321,838.20
  6. Step 6: Final answer
    x = 127,807.20

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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.