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Finding the Fourth Proportional to 206,424.20, 309,636.30 and 180,180.20

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Solution

The fourth proportional to 206,424.20, 309,636.30 and 180,180.20 is: 270,270.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,424.20 : 309,636.30 = 180,180.20 : x
  2. Step 2: Convert to fraction form
    206,424.20/309,636.30 = 180,180.20/x
  3. Step 3: Cross multiply
    206,424.20x = 309,636.30 × 180,180.20
  4. Step 4: Simplify right side
    206,424.20x = 55,790,330,461.26
  5. Step 5: Solve for x
    x = 55,790,330,461.26/206,424.20
  6. Step 6: Final answer
    x = 270,270.30

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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.