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Finding the Fourth Proportional to 308,879.29, 426,250.16 and 172,914.36

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Solution

The fourth proportional to 308,879.29, 426,250.16 and 172,914.36 is: 238,619.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,879.29 : 426,250.16 = 172,914.36 : x
  2. Step 2: Convert to fraction form
    308,879.29/426,250.16 = 172,914.36/x
  3. Step 3: Cross multiply
    308,879.29x = 426,250.16 × 172,914.36
  4. Step 4: Simplify right side
    308,879.29x = 73,704,771,485.05
  5. Step 5: Solve for x
    x = 73,704,771,485.05/308,879.29
  6. Step 6: Final answer
    x = 238,619.98

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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.