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Finding the Fourth Proportional to 355.04, 490 and 217.04

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Solution

The fourth proportional to 355.04, 490 and 217.04 is: 299.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.04 : 490 = 217.04 : x
  2. Step 2: Convert to fraction form
    355.04/490 = 217.04/x
  3. Step 3: Cross multiply
    355.04x = 490 × 217.04
  4. Step 4: Simplify right side
    355.04x = 106,349.60
  5. Step 5: Solve for x
    x = 106,349.60/355.04
  6. Step 6: Final answer
    x = 299.54

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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.