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Finding the Fourth Proportional to 217.83, 300.49 and 130.48

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Solution

The fourth proportional to 217.83, 300.49 and 130.48 is: 179.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.83 : 300.49 = 130.48 : x
  2. Step 2: Convert to fraction form
    217.83/300.49 = 130.48/x
  3. Step 3: Cross multiply
    217.83x = 300.49 × 130.48
  4. Step 4: Simplify right side
    217.83x = 39,207.94
  5. Step 5: Solve for x
    x = 39,207.94/217.83
  6. Step 6: Final answer
    x = 179.99

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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.