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Finding the Fourth Proportional to 320,860.72, 481,129.06 and 187,780.96

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Solution

The fourth proportional to 320,860.72, 481,129.06 and 187,780.96 is: 281,576.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,860.72 : 481,129.06 = 187,780.96 : x
  2. Step 2: Convert to fraction form
    320,860.72/481,129.06 = 187,780.96/x
  3. Step 3: Cross multiply
    320,860.72x = 481,129.06 × 187,780.96
  4. Step 4: Simplify right side
    320,860.72x = 90,346,876,770.70
  5. Step 5: Solve for x
    x = 90,346,876,770.70/320,860.72
  6. Step 6: Final answer
    x = 281,576.62

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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.