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Finding the Fourth Proportional to 355, 531.73 and 217.63

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Solution

The fourth proportional to 355, 531.73 and 217.63 is: 325.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    355 : 531.73 = 217.63 : x
  2. Step 2: Convert to fraction form
    355/531.73 = 217.63/x
  3. Step 3: Cross multiply
    355x = 531.73 × 217.63
  4. Step 4: Simplify right side
    355x = 115,720.40
  5. Step 5: Solve for x
    x = 115,720.40/355
  6. Step 6: Final answer
    x = 325.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.