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Finding the Fourth Proportional to 324.32, 486.32 and 118.80

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Solution

The fourth proportional to 324.32, 486.32 and 118.80 is: 178.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.32 : 486.32 = 118.80 : x
  2. Step 2: Convert to fraction form
    324.32/486.32 = 118.80/x
  3. Step 3: Cross multiply
    324.32x = 486.32 × 118.80
  4. Step 4: Simplify right side
    324.32x = 57,774.82
  5. Step 5: Solve for x
    x = 57,774.82/324.32
  6. Step 6: Final answer
    x = 178.14

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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.