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Finding the Fourth Proportional to 309,174.17, 426,659.40 and 171,361.89

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Solution

The fourth proportional to 309,174.17, 426,659.40 and 171,361.89 is: 236,478.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,174.17 : 426,659.40 = 171,361.89 : x
  2. Step 2: Convert to fraction form
    309,174.17/426,659.40 = 171,361.89/x
  3. Step 3: Cross multiply
    309,174.17x = 426,659.40 × 171,361.89
  4. Step 4: Simplify right side
    309,174.17x = 73,113,161,170.27
  5. Step 5: Solve for x
    x = 73,113,161,170.27/309,174.17
  6. Step 6: Final answer
    x = 236,478.88

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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.