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Finding the Fourth Proportional to 279,379.40, 419,181.34 and 127,648.40

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Solution

The fourth proportional to 279,379.40, 419,181.34 and 127,648.40 is: 191,523.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,379.40 : 419,181.34 = 127,648.40 : x
  2. Step 2: Convert to fraction form
    279,379.40/419,181.34 = 127,648.40/x
  3. Step 3: Cross multiply
    279,379.40x = 419,181.34 × 127,648.40
  4. Step 4: Simplify right side
    279,379.40x = 53,507,827,360.86
  5. Step 5: Solve for x
    x = 53,507,827,360.86/279,379.40
  6. Step 6: Final answer
    x = 191,523.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.