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Finding the Fourth Proportional to 323,516.60, 485,712.30 and 205,418.60

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Solution

The fourth proportional to 323,516.60, 485,712.30 and 205,418.60 is: 308,405.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,516.60 : 485,712.30 = 205,418.60 : x
  2. Step 2: Convert to fraction form
    323,516.60/485,712.30 = 205,418.60/x
  3. Step 3: Cross multiply
    323,516.60x = 485,712.30 × 205,418.60
  4. Step 4: Simplify right side
    323,516.60x = 99,774,340,668.78
  5. Step 5: Solve for x
    x = 99,774,340,668.78/323,516.60
  6. Step 6: Final answer
    x = 308,405.63

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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.