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Finding the Fourth Proportional to 257.09, 354.74 and 174.44

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Solution

The fourth proportional to 257.09, 354.74 and 174.44 is: 240.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.09 : 354.74 = 174.44 : x
  2. Step 2: Convert to fraction form
    257.09/354.74 = 174.44/x
  3. Step 3: Cross multiply
    257.09x = 354.74 × 174.44
  4. Step 4: Simplify right side
    257.09x = 61,880.85
  5. Step 5: Solve for x
    x = 61,880.85/257.09
  6. Step 6: Final answer
    x = 240.70

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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.