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Finding the Fourth Proportional to 323,738.80, 485,608.20 and 211,764.40

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Solution

The fourth proportional to 323,738.80, 485,608.20 and 211,764.40 is: 317,646.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,738.80 : 485,608.20 = 211,764.40 : x
  2. Step 2: Convert to fraction form
    323,738.80/485,608.20 = 211,764.40/x
  3. Step 3: Cross multiply
    323,738.80x = 485,608.20 × 211,764.40
  4. Step 4: Simplify right side
    323,738.80x = 102,834,529,108.08
  5. Step 5: Solve for x
    x = 102,834,529,108.08/323,738.80
  6. Step 6: Final answer
    x = 317,646.60

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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.