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Finding the Fourth Proportional to 355.95, 491.13 and 224.91

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Solution

The fourth proportional to 355.95, 491.13 and 224.91 is: 310.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.95 : 491.13 = 224.91 : x
  2. Step 2: Convert to fraction form
    355.95/491.13 = 224.91/x
  3. Step 3: Cross multiply
    355.95x = 491.13 × 224.91
  4. Step 4: Simplify right side
    355.95x = 110,460.05
  5. Step 5: Solve for x
    x = 110,460.05/355.95
  6. Step 6: Final answer
    x = 310.32

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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.