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Finding the Fourth Proportional to 308,755.20, 426,102.72 and 172,800.96

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Solution

The fourth proportional to 308,755.20, 426,102.72 and 172,800.96 is: 238,476.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,755.20 : 426,102.72 = 172,800.96 : x
  2. Step 2: Convert to fraction form
    308,755.20/426,102.72 = 172,800.96/x
  3. Step 3: Cross multiply
    308,755.20x = 426,102.72 × 172,800.96
  4. Step 4: Simplify right side
    308,755.20x = 73,630,959,074.61
  5. Step 5: Solve for x
    x = 73,630,959,074.61/308,755.20
  6. Step 6: Final answer
    x = 238,476.82

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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.