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Finding the Fourth Proportional to 206,580.80, 309,871.20 and 180,336.80

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Solution

The fourth proportional to 206,580.80, 309,871.20 and 180,336.80 is: 270,505.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,580.80 : 309,871.20 = 180,336.80 : x
  2. Step 2: Convert to fraction form
    206,580.80/309,871.20 = 180,336.80/x
  3. Step 3: Cross multiply
    206,580.80x = 309,871.20 × 180,336.80
  4. Step 4: Simplify right side
    206,580.80x = 55,881,180,620.16
  5. Step 5: Solve for x
    x = 55,881,180,620.16/206,580.80
  6. Step 6: Final answer
    x = 270,505.20

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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.