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Finding the Fourth Proportional to 323,974.10, 485,961.15 and 205,730.30

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Solution

The fourth proportional to 323,974.10, 485,961.15 and 205,730.30 is: 308,595.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,974.10 : 485,961.15 = 205,730.30 : x
  2. Step 2: Convert to fraction form
    323,974.10/485,961.15 = 205,730.30/x
  3. Step 3: Cross multiply
    323,974.10x = 485,961.15 × 205,730.30
  4. Step 4: Simplify right side
    323,974.10x = 99,976,933,177.85
  5. Step 5: Solve for x
    x = 99,976,933,177.85/323,974.10
  6. Step 6: Final answer
    x = 308,595.45

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Similar ratio
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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.