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Finding the Fourth Proportional to 213,816.20, 320,801.10 and 206,136.20

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Solution

The fourth proportional to 213,816.20, 320,801.10 and 206,136.20 is: 309,278.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,816.20 : 320,801.10 = 206,136.20 : x
  2. Step 2: Convert to fraction form
    213,816.20/320,801.10 = 206,136.20/x
  3. Step 3: Cross multiply
    213,816.20x = 320,801.10 × 206,136.20
  4. Step 4: Simplify right side
    213,816.20x = 66,128,719,709.82
  5. Step 5: Solve for x
    x = 66,128,719,709.82/213,816.20
  6. Step 6: Final answer
    x = 309,278.34

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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.