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Finding the Fourth Proportional to 486.59, 730.17 and 198

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Solution

The fourth proportional to 486.59, 730.17 and 198 is: 297.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.59 : 730.17 = 198 : x
  2. Step 2: Convert to fraction form
    486.59/730.17 = 198/x
  3. Step 3: Cross multiply
    486.59x = 730.17 × 198
  4. Step 4: Simplify right side
    486.59x = 144,573.66
  5. Step 5: Solve for x
    x = 144,573.66/486.59
  6. Step 6: Final answer
    x = 297.12

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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.