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Finding the Fourth Proportional to 355.51, 490.26 and 250.57

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Solution

The fourth proportional to 355.51, 490.26 and 250.57 is: 345.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.51 : 490.26 = 250.57 : x
  2. Step 2: Convert to fraction form
    355.51/490.26 = 250.57/x
  3. Step 3: Cross multiply
    355.51x = 490.26 × 250.57
  4. Step 4: Simplify right side
    355.51x = 122,844.45
  5. Step 5: Solve for x
    x = 122,844.45/355.51
  6. Step 6: Final answer
    x = 345.54

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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.