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Finding the Fourth Proportional to 308,633.36, 425,896.79 and 172,641.04

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Solution

The fourth proportional to 308,633.36, 425,896.79 and 172,641.04 is: 238,234.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,633.36 : 425,896.79 = 172,641.04 : x
  2. Step 2: Convert to fraction form
    308,633.36/425,896.79 = 172,641.04/x
  3. Step 3: Cross multiply
    308,633.36x = 425,896.79 × 172,641.04
  4. Step 4: Simplify right side
    308,633.36x = 73,527,262,830.31
  5. Step 5: Solve for x
    x = 73,527,262,830.31/308,633.36
  6. Step 6: Final answer
    x = 238,234.99

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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.