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Finding the Fourth Proportional to 355.26, 489.91 and 250.32

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Solution

The fourth proportional to 355.26, 489.91 and 250.32 is: 345.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.26 : 489.91 = 250.32 : x
  2. Step 2: Convert to fraction form
    355.26/489.91 = 250.32/x
  3. Step 3: Cross multiply
    355.26x = 489.91 × 250.32
  4. Step 4: Simplify right side
    355.26x = 122,634.27
  5. Step 5: Solve for x
    x = 122,634.27/355.26
  6. Step 6: Final answer
    x = 345.20

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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.