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Finding the Fourth Proportional to 308,634.87, 425,932.66 and 172,660.70

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Solution

The fourth proportional to 308,634.87, 425,932.66 and 172,660.70 is: 238,281.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,634.87 : 425,932.66 = 172,660.70 : x
  2. Step 2: Convert to fraction form
    308,634.87/425,932.66 = 172,660.70/x
  3. Step 3: Cross multiply
    308,634.87x = 425,932.66 × 172,660.70
  4. Step 4: Simplify right side
    308,634.87x = 73,541,830,365.16
  5. Step 5: Solve for x
    x = 73,541,830,365.16/308,634.87
  6. Step 6: Final answer
    x = 238,281.02

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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.