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Finding the Fourth Proportional to 3,609,679.89, 4,981,361.73 and 1,978,090.86

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Solution

The fourth proportional to 3,609,679.89, 4,981,361.73 and 1,978,090.86 is: 2,729,767.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,609,679.89 : 4,981,361.73 = 1,978,090.86 : x
  2. Step 2: Convert to fraction form
    3,609,679.89/4,981,361.73 = 1,978,090.86/x
  3. Step 3: Cross multiply
    3,609,679.89x = 4,981,361.73 × 1,978,090.86
  4. Step 4: Simplify right side
    3,609,679.89x = 9,853,586,108,466.79
  5. Step 5: Solve for x
    x = 9,853,586,108,466.79/3,609,679.89
  6. Step 6: Final answer
    x = 2,729,767.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.