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Finding the Fourth Proportional to 355.46, 490.45 and 244.90

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Solution

The fourth proportional to 355.46, 490.45 and 244.90 is: 337.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.46 : 490.45 = 244.90 : x
  2. Step 2: Convert to fraction form
    355.46/490.45 = 244.90/x
  3. Step 3: Cross multiply
    355.46x = 490.45 × 244.90
  4. Step 4: Simplify right side
    355.46x = 120,111.21
  5. Step 5: Solve for x
    x = 120,111.21/355.46
  6. Step 6: Final answer
    x = 337.90

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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.