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Finding the Fourth Proportional to 322,458.60, 483,687.90 and 85,825.20

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Solution

The fourth proportional to 322,458.60, 483,687.90 and 85,825.20 is: 128,737.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,458.60 : 483,687.90 = 85,825.20 : x
  2. Step 2: Convert to fraction form
    322,458.60/483,687.90 = 85,825.20/x
  3. Step 3: Cross multiply
    322,458.60x = 483,687.90 × 85,825.20
  4. Step 4: Simplify right side
    322,458.60x = 41,512,610,755.08
  5. Step 5: Solve for x
    x = 41,512,610,755.08/322,458.60
  6. Step 6: Final answer
    x = 128,737.80

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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.