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Finding the Fourth Proportional to 344.82, 475.98 and 257.55

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Solution

The fourth proportional to 344.82, 475.98 and 257.55 is: 355.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.82 : 475.98 = 257.55 : x
  2. Step 2: Convert to fraction form
    344.82/475.98 = 257.55/x
  3. Step 3: Cross multiply
    344.82x = 475.98 × 257.55
  4. Step 4: Simplify right side
    344.82x = 122,588.65
  5. Step 5: Solve for x
    x = 122,588.65/344.82
  6. Step 6: Final answer
    x = 355.51

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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.