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Finding the Fourth Proportional to 308,140.48, 425,218.32 and 172,147.44

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Solution

The fourth proportional to 308,140.48, 425,218.32 and 172,147.44 is: 237,554.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,140.48 : 425,218.32 = 172,147.44 : x
  2. Step 2: Convert to fraction form
    308,140.48/425,218.32 = 172,147.44/x
  3. Step 3: Cross multiply
    308,140.48x = 425,218.32 × 172,147.44
  4. Step 4: Simplify right side
    308,140.48x = 73,200,245,229.10
  5. Step 5: Solve for x
    x = 73,200,245,229.10/308,140.48
  6. Step 6: Final answer
    x = 237,554.78

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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.