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Finding the Fourth Proportional to 253,608.21, 349,979.31 and 140,430.96

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Solution

The fourth proportional to 253,608.21, 349,979.31 and 140,430.96 is: 193,794.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,608.21 : 349,979.31 = 140,430.96 : x
  2. Step 2: Convert to fraction form
    253,608.21/349,979.31 = 140,430.96/x
  3. Step 3: Cross multiply
    253,608.21x = 349,979.31 × 140,430.96
  4. Step 4: Simplify right side
    253,608.21x = 49,147,930,483.44
  5. Step 5: Solve for x
    x = 49,147,930,483.44/253,608.21
  6. Step 6: Final answer
    x = 193,794.71

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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.