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Finding the Fourth Proportional to 321,718.20, 482,634.90 and 134,748.60

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Solution

The fourth proportional to 321,718.20, 482,634.90 and 134,748.60 is: 202,147.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,718.20 : 482,634.90 = 134,748.60 : x
  2. Step 2: Convert to fraction form
    321,718.20/482,634.90 = 134,748.60/x
  3. Step 3: Cross multiply
    321,718.20x = 482,634.90 × 134,748.60
  4. Step 4: Simplify right side
    321,718.20x = 65,034,377,086.14
  5. Step 5: Solve for x
    x = 65,034,377,086.14/321,718.20
  6. Step 6: Final answer
    x = 202,147.03

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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.