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Finding the Fourth Proportional to 285.25, 393.58 and 174.65

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Solution

The fourth proportional to 285.25, 393.58 and 174.65 is: 240.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.25 : 393.58 = 174.65 : x
  2. Step 2: Convert to fraction form
    285.25/393.58 = 174.65/x
  3. Step 3: Cross multiply
    285.25x = 393.58 × 174.65
  4. Step 4: Simplify right side
    285.25x = 68,738.75
  5. Step 5: Solve for x
    x = 68,738.75/285.25
  6. Step 6: Final answer
    x = 240.98

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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.