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Finding the Fourth Proportional to 308,548.38, 425,836.20 and 172,589.88

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Solution

The fourth proportional to 308,548.38, 425,836.20 and 172,589.88 is: 238,196.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,548.38 : 425,836.20 = 172,589.88 : x
  2. Step 2: Convert to fraction form
    308,548.38/425,836.20 = 172,589.88/x
  3. Step 3: Cross multiply
    308,548.38x = 425,836.20 × 172,589.88
  4. Step 4: Simplify right side
    308,548.38x = 73,495,018,657.66
  5. Step 5: Solve for x
    x = 73,495,018,657.66/308,548.38
  6. Step 6: Final answer
    x = 238,196.09

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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.