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Finding the Fourth Proportional to 308,802.13, 426,049.80 and 172,814.47

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Solution

The fourth proportional to 308,802.13, 426,049.80 and 172,814.47 is: 238,429.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,802.13 : 426,049.80 = 172,814.47 : x
  2. Step 2: Convert to fraction form
    308,802.13/426,049.80 = 172,814.47/x
  3. Step 3: Cross multiply
    308,802.13x = 426,049.80 × 172,814.47
  4. Step 4: Simplify right side
    308,802.13x = 73,627,570,351.73
  5. Step 5: Solve for x
    x = 73,627,570,351.73/308,802.13
  6. Step 6: Final answer
    x = 238,429.61

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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.