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Finding the Fourth Proportional to 408,070.10, 612,105.15 and 221,446.10

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Solution

The fourth proportional to 408,070.10, 612,105.15 and 221,446.10 is: 332,169.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,070.10 : 612,105.15 = 221,446.10 : x
  2. Step 2: Convert to fraction form
    408,070.10/612,105.15 = 221,446.10/x
  3. Step 3: Cross multiply
    408,070.10x = 612,105.15 × 221,446.10
  4. Step 4: Simplify right side
    408,070.10x = 135,548,298,257.42
  5. Step 5: Solve for x
    x = 135,548,298,257.42/408,070.10
  6. Step 6: Final answer
    x = 332,169.15

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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.