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Finding the Fourth Proportional to 323,793.40, 485,690.10 and 205,112.20

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Solution

The fourth proportional to 323,793.40, 485,690.10 and 205,112.20 is: 307,668.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,793.40 : 485,690.10 = 205,112.20 : x
  2. Step 2: Convert to fraction form
    323,793.40/485,690.10 = 205,112.20/x
  3. Step 3: Cross multiply
    323,793.40x = 485,690.10 × 205,112.20
  4. Step 4: Simplify right side
    323,793.40x = 99,620,964,929.22
  5. Step 5: Solve for x
    x = 99,620,964,929.22/323,793.40
  6. Step 6: Final answer
    x = 307,668.30

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1.5x scale

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.