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Finding the Fourth Proportional to 489.56, 675.59 and 324

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Solution

The fourth proportional to 489.56, 675.59 and 324 is: 447.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.56 : 675.59 = 324 : x
  2. Step 2: Convert to fraction form
    489.56/675.59 = 324/x
  3. Step 3: Cross multiply
    489.56x = 675.59 × 324
  4. Step 4: Simplify right side
    489.56x = 218,889.54
  5. Step 5: Solve for x
    x = 218,889.54/489.56
  6. Step 6: Final answer
    x = 447.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.