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Finding the Fourth Proportional to 285.18, 393.36 and 174.57

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Solution

The fourth proportional to 285.18, 393.36 and 174.57 is: 240.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.18 : 393.36 = 174.57 : x
  2. Step 2: Convert to fraction form
    285.18/393.36 = 174.57/x
  3. Step 3: Cross multiply
    285.18x = 393.36 × 174.57
  4. Step 4: Simplify right side
    285.18x = 68,668.86
  5. Step 5: Solve for x
    x = 68,668.86/285.18
  6. Step 6: Final answer
    x = 240.79

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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.