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Finding the Fourth Proportional to 486.01, 729.02 and 120.80

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Solution

The fourth proportional to 486.01, 729.02 and 120.80 is: 181.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.01 : 729.02 = 120.80 : x
  2. Step 2: Convert to fraction form
    486.01/729.02 = 120.80/x
  3. Step 3: Cross multiply
    486.01x = 729.02 × 120.80
  4. Step 4: Simplify right side
    486.01x = 88,065.62
  5. Step 5: Solve for x
    x = 88,065.62/486.01
  6. Step 6: Final answer
    x = 181.20

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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.