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Finding the Fourth Proportional to 486.50, 729.90 and 162.09

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Solution

The fourth proportional to 486.50, 729.90 and 162.09 is: 243.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.50 : 729.90 = 162.09 : x
  2. Step 2: Convert to fraction form
    486.50/729.90 = 162.09/x
  3. Step 3: Cross multiply
    486.50x = 729.90 × 162.09
  4. Step 4: Simplify right side
    486.50x = 118,309.49
  5. Step 5: Solve for x
    x = 118,309.49/486.50
  6. Step 6: Final answer
    x = 243.18

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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.