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Finding the Fourth Proportional to 321,640.60, 482,462.14 and 134,520.84

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Solution

The fourth proportional to 321,640.60, 482,462.14 and 134,520.84 is: 201,781.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,640.60 : 482,462.14 = 134,520.84 : x
  2. Step 2: Convert to fraction form
    321,640.60/482,462.14 = 134,520.84/x
  3. Step 3: Cross multiply
    321,640.60x = 482,462.14 × 134,520.84
  4. Step 4: Simplify right side
    321,640.60x = 64,901,212,341.00
  5. Step 5: Solve for x
    x = 64,901,212,341.00/321,640.60
  6. Step 6: Final answer
    x = 201,781.78

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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.