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Finding the Fourth Proportional to 279,986.64, 419,861.49 and 153,590.79

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Solution

The fourth proportional to 279,986.64, 419,861.49 and 153,590.79 is: 230,321.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,986.64 : 419,861.49 = 153,590.79 : x
  2. Step 2: Convert to fraction form
    279,986.64/419,861.49 = 153,590.79/x
  3. Step 3: Cross multiply
    279,986.64x = 419,861.49 × 153,590.79
  4. Step 4: Simplify right side
    279,986.64x = 64,486,857,939.68
  5. Step 5: Solve for x
    x = 64,486,857,939.68/279,986.64
  6. Step 6: Final answer
    x = 230,321.20

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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.