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Finding the Fourth Proportional to 308,640.86, 425,922.24 and 172,674.26

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Solution

The fourth proportional to 308,640.86, 425,922.24 and 172,674.26 is: 238,289.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,640.86 : 425,922.24 = 172,674.26 : x
  2. Step 2: Convert to fraction form
    308,640.86/425,922.24 = 172,674.26/x
  3. Step 3: Cross multiply
    308,640.86x = 425,922.24 × 172,674.26
  4. Step 4: Simplify right side
    308,640.86x = 73,545,807,609.54
  5. Step 5: Solve for x
    x = 73,545,807,609.54/308,640.86
  6. Step 6: Final answer
    x = 238,289.28

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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.