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Finding the Fourth Proportional to 323,621.60, 485,354.64 and 165,768.80

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Solution

The fourth proportional to 323,621.60, 485,354.64 and 165,768.80 is: 248,613.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,621.60 : 485,354.64 = 165,768.80 : x
  2. Step 2: Convert to fraction form
    323,621.60/485,354.64 = 165,768.80/x
  3. Step 3: Cross multiply
    323,621.60x = 485,354.64 × 165,768.80
  4. Step 4: Simplify right side
    323,621.60x = 80,456,656,247.23
  5. Step 5: Solve for x
    x = 80,456,656,247.23/323,621.60
  6. Step 6: Final answer
    x = 248,613.37

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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.