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Finding the Fourth Proportional to 219,213.80, 328,820.70 and 206,966.60

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Solution

The fourth proportional to 219,213.80, 328,820.70 and 206,966.60 is: 310,449.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,213.80 : 328,820.70 = 206,966.60 : x
  2. Step 2: Convert to fraction form
    219,213.80/328,820.70 = 206,966.60/x
  3. Step 3: Cross multiply
    219,213.80x = 328,820.70 × 206,966.60
  4. Step 4: Simplify right side
    219,213.80x = 68,054,902,288.62
  5. Step 5: Solve for x
    x = 68,054,902,288.62/219,213.80
  6. Step 6: Final answer
    x = 310,449.90

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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.