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Finding the Fourth Proportional to 324.00, 486.21 and 131.63

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Solution

The fourth proportional to 324.00, 486.21 and 131.63 is: 197.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.00 : 486.21 = 131.63 : x
  2. Step 2: Convert to fraction form
    324.00/486.21 = 131.63/x
  3. Step 3: Cross multiply
    324.00x = 486.21 × 131.63
  4. Step 4: Simplify right side
    324.00x = 63,998.11
  5. Step 5: Solve for x
    x = 63,998.11/324.00
  6. Step 6: Final answer
    x = 197.52

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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.