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Finding the Fourth Proportional to 320,859.72, 481,127.56 and 187,779.96

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Solution

The fourth proportional to 320,859.72, 481,127.56 and 187,779.96 is: 281,575.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,859.72 : 481,127.56 = 187,779.96 : x
  2. Step 2: Convert to fraction form
    320,859.72/481,127.56 = 187,779.96/x
  3. Step 3: Cross multiply
    320,859.72x = 481,127.56 × 187,779.96
  4. Step 4: Simplify right side
    320,859.72x = 90,346,113,971.70
  5. Step 5: Solve for x
    x = 90,346,113,971.70/320,859.72
  6. Step 6: Final answer
    x = 281,575.12

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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.