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Finding the Fourth Proportional to 324.65, 486.56 and 216.53

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Solution

The fourth proportional to 324.65, 486.56 and 216.53 is: 324.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.65 : 486.56 = 216.53 : x
  2. Step 2: Convert to fraction form
    324.65/486.56 = 216.53/x
  3. Step 3: Cross multiply
    324.65x = 486.56 × 216.53
  4. Step 4: Simplify right side
    324.65x = 105,353.75
  5. Step 5: Solve for x
    x = 105,353.75/324.65
  6. Step 6: Final answer
    x = 324.51

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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.