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Finding the Fourth Proportional to 353.24, 487.46 and 205.90

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Solution

The fourth proportional to 353.24, 487.46 and 205.90 is: 284.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.24 : 487.46 = 205.90 : x
  2. Step 2: Convert to fraction form
    353.24/487.46 = 205.90/x
  3. Step 3: Cross multiply
    353.24x = 487.46 × 205.90
  4. Step 4: Simplify right side
    353.24x = 100,368.01
  5. Step 5: Solve for x
    x = 100,368.01/353.24
  6. Step 6: Final answer
    x = 284.14

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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.