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Finding the Fourth Proportional to 326.24, 489.34 and 189.18

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Solution

The fourth proportional to 326.24, 489.34 and 189.18 is: 283.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.24 : 489.34 = 189.18 : x
  2. Step 2: Convert to fraction form
    326.24/489.34 = 189.18/x
  3. Step 3: Cross multiply
    326.24x = 489.34 × 189.18
  4. Step 4: Simplify right side
    326.24x = 92,573.34
  5. Step 5: Solve for x
    x = 92,573.34/326.24
  6. Step 6: Final answer
    x = 283.76

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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.