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Finding the Fourth Proportional to 355.90, 490.94 and 224.86

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Solution

The fourth proportional to 355.90, 490.94 and 224.86 is: 310.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.90 : 490.94 = 224.86 : x
  2. Step 2: Convert to fraction form
    355.90/490.94 = 224.86/x
  3. Step 3: Cross multiply
    355.90x = 490.94 × 224.86
  4. Step 4: Simplify right side
    355.90x = 110,392.77
  5. Step 5: Solve for x
    x = 110,392.77/355.90
  6. Step 6: Final answer
    x = 310.18

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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.