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Finding the Fourth Proportional to 486.62, 729.18 and 323.72

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Solution

The fourth proportional to 486.62, 729.18 and 323.72 is: 485.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.62 : 729.18 = 323.72 : x
  2. Step 2: Convert to fraction form
    486.62/729.18 = 323.72/x
  3. Step 3: Cross multiply
    486.62x = 729.18 × 323.72
  4. Step 4: Simplify right side
    486.62x = 236,050.15
  5. Step 5: Solve for x
    x = 236,050.15/486.62
  6. Step 6: Final answer
    x = 485.08

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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.