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Finding the Fourth Proportional to 272,414.40, 408,928.80 and 161,668.80

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Solution

The fourth proportional to 272,414.40, 408,928.80 and 161,668.80 is: 242,685.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,414.40 : 408,928.80 = 161,668.80 : x
  2. Step 2: Convert to fraction form
    272,414.40/408,928.80 = 161,668.80/x
  3. Step 3: Cross multiply
    272,414.40x = 408,928.80 × 161,668.80
  4. Step 4: Simplify right side
    272,414.40x = 66,111,028,381.44
  5. Step 5: Solve for x
    x = 66,111,028,381.44/272,414.40
  6. Step 6: Final answer
    x = 242,685.51

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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.