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Finding the Fourth Proportional to 324.90, 486.87 and 162.36

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Solution

The fourth proportional to 324.90, 486.87 and 162.36 is: 243.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.90 : 486.87 = 162.36 : x
  2. Step 2: Convert to fraction form
    324.90/486.87 = 162.36/x
  3. Step 3: Cross multiply
    324.90x = 486.87 × 162.36
  4. Step 4: Simplify right side
    324.90x = 79,048.21
  5. Step 5: Solve for x
    x = 79,048.21/324.90
  6. Step 6: Final answer
    x = 243.30

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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.