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Finding the Fourth Proportional to 355.11, 490.05 and 224.16

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Solution

The fourth proportional to 355.11, 490.05 and 224.16 is: 309.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.11 : 490.05 = 224.16 : x
  2. Step 2: Convert to fraction form
    355.11/490.05 = 224.16/x
  3. Step 3: Cross multiply
    355.11x = 490.05 × 224.16
  4. Step 4: Simplify right side
    355.11x = 109,849.61
  5. Step 5: Solve for x
    x = 109,849.61/355.11
  6. Step 6: Final answer
    x = 309.34

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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.