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Finding the Fourth Proportional to 285.09, 393.46 and 174.64

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Solution

The fourth proportional to 285.09, 393.46 and 174.64 is: 241.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.09 : 393.46 = 174.64 : x
  2. Step 2: Convert to fraction form
    285.09/393.46 = 174.64/x
  3. Step 3: Cross multiply
    285.09x = 393.46 × 174.64
  4. Step 4: Simplify right side
    285.09x = 68,713.85
  5. Step 5: Solve for x
    x = 68,713.85/285.09
  6. Step 6: Final answer
    x = 241.03

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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.