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Finding the Fourth Proportional to 486.72, 729.92 and 198.08

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Solution

The fourth proportional to 486.72, 729.92 and 198.08 is: 297.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.72 : 729.92 = 198.08 : x
  2. Step 2: Convert to fraction form
    486.72/729.92 = 198.08/x
  3. Step 3: Cross multiply
    486.72x = 729.92 × 198.08
  4. Step 4: Simplify right side
    486.72x = 144,582.55
  5. Step 5: Solve for x
    x = 144,582.55/486.72
  6. Step 6: Final answer
    x = 297.05

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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.