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Finding the Fourth Proportional to 324.32, 444.64 and 318.48

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Solution

The fourth proportional to 324.32, 444.64 and 318.48 is: 436.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.32 : 444.64 = 318.48 : x
  2. Step 2: Convert to fraction form
    324.32/444.64 = 318.48/x
  3. Step 3: Cross multiply
    324.32x = 444.64 × 318.48
  4. Step 4: Simplify right side
    324.32x = 141,608.95
  5. Step 5: Solve for x
    x = 141,608.95/324.32
  6. Step 6: Final answer
    x = 436.63

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.