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Finding the Fourth Proportional to 221,405.20, 331,767.60 and 164,980.60

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Solution

The fourth proportional to 221,405.20, 331,767.60 and 164,980.60 is: 247,217.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,405.20 : 331,767.60 = 164,980.60 : x
  2. Step 2: Convert to fraction form
    221,405.20/331,767.60 = 164,980.60/x
  3. Step 3: Cross multiply
    221,405.20x = 331,767.60 × 164,980.60
  4. Step 4: Simplify right side
    221,405.20x = 54,735,217,708.56
  5. Step 5: Solve for x
    x = 54,735,217,708.56/221,405.20
  6. Step 6: Final answer
    x = 247,217.40

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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.