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Finding the Fourth Proportional to 308,591.96, 425,836.80 and 172,602.32

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Solution

The fourth proportional to 308,591.96, 425,836.80 and 172,602.32 is: 238,179.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,591.96 : 425,836.80 = 172,602.32 : x
  2. Step 2: Convert to fraction form
    308,591.96/425,836.80 = 172,602.32/x
  3. Step 3: Cross multiply
    308,591.96x = 425,836.80 × 172,602.32
  4. Step 4: Simplify right side
    308,591.96x = 73,500,419,621.38
  5. Step 5: Solve for x
    x = 73,500,419,621.38/308,591.96
  6. Step 6: Final answer
    x = 238,179.96

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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.