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Finding the Fourth Proportional to 206,612.20, 309,918.30 and 143,298.55

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Solution

The fourth proportional to 206,612.20, 309,918.30 and 143,298.55 is: 214,947.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,612.20 : 309,918.30 = 143,298.55 : x
  2. Step 2: Convert to fraction form
    206,612.20/309,918.30 = 143,298.55/x
  3. Step 3: Cross multiply
    206,612.20x = 309,918.30 × 143,298.55
  4. Step 4: Simplify right side
    206,612.20x = 44,410,843,008.47
  5. Step 5: Solve for x
    x = 44,410,843,008.47/206,612.20
  6. Step 6: Final answer
    x = 214,947.83

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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.