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Finding the Fourth Proportional to 486.96, 729.06 and 324.32

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Solution

The fourth proportional to 486.96, 729.06 and 324.32 is: 485.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.96 : 729.06 = 324.32 : x
  2. Step 2: Convert to fraction form
    486.96/729.06 = 324.32/x
  3. Step 3: Cross multiply
    486.96x = 729.06 × 324.32
  4. Step 4: Simplify right side
    486.96x = 236,448.74
  5. Step 5: Solve for x
    x = 236,448.74/486.96
  6. Step 6: Final answer
    x = 485.56

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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.