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Finding the Fourth Proportional to 541.65, 811.26 and 324.78

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Solution

The fourth proportional to 541.65, 811.26 and 324.78 is: 486.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.65 : 811.26 = 324.78 : x
  2. Step 2: Convert to fraction form
    541.65/811.26 = 324.78/x
  3. Step 3: Cross multiply
    541.65x = 811.26 × 324.78
  4. Step 4: Simplify right side
    541.65x = 263,481.02
  5. Step 5: Solve for x
    x = 263,481.02/541.65
  6. Step 6: Final answer
    x = 486.44

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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.