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Finding the Fourth Proportional to 308,737.20, 426,077.10 and 172,786.80

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Solution

The fourth proportional to 308,737.20, 426,077.10 and 172,786.80 is: 238,456.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,737.20 : 426,077.10 = 172,786.80 : x
  2. Step 2: Convert to fraction form
    308,737.20/426,077.10 = 172,786.80/x
  3. Step 3: Cross multiply
    308,737.20x = 426,077.10 × 172,786.80
  4. Step 4: Simplify right side
    308,737.20x = 73,620,498,662.28
  5. Step 5: Solve for x
    x = 73,620,498,662.28/308,737.20
  6. Step 6: Final answer
    x = 238,456.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.