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Finding the Fourth Proportional to 259,630.80, 389,446.20 and 141,241.20

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Solution

The fourth proportional to 259,630.80, 389,446.20 and 141,241.20 is: 211,861.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,630.80 : 389,446.20 = 141,241.20 : x
  2. Step 2: Convert to fraction form
    259,630.80/389,446.20 = 141,241.20/x
  3. Step 3: Cross multiply
    259,630.80x = 389,446.20 × 141,241.20
  4. Step 4: Simplify right side
    259,630.80x = 55,005,848,623.44
  5. Step 5: Solve for x
    x = 55,005,848,623.44/259,630.80
  6. Step 6: Final answer
    x = 211,861.80

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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.