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Finding the Fourth Proportional to 486.23, 729.23 and 161.51

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Solution

The fourth proportional to 486.23, 729.23 and 161.51 is: 242.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.23 : 729.23 = 161.51 : x
  2. Step 2: Convert to fraction form
    486.23/729.23 = 161.51/x
  3. Step 3: Cross multiply
    486.23x = 729.23 × 161.51
  4. Step 4: Simplify right side
    486.23x = 117,773.48
  5. Step 5: Solve for x
    x = 117,773.48/486.23
  6. Step 6: Final answer
    x = 242.22

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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.