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Finding the Fourth Proportional to 327.07, 489.79 and 211.51

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Solution

The fourth proportional to 327.07, 489.79 and 211.51 is: 316.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.07 : 489.79 = 211.51 : x
  2. Step 2: Convert to fraction form
    327.07/489.79 = 211.51/x
  3. Step 3: Cross multiply
    327.07x = 489.79 × 211.51
  4. Step 4: Simplify right side
    327.07x = 103,595.48
  5. Step 5: Solve for x
    x = 103,595.48/327.07
  6. Step 6: Final answer
    x = 316.74

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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.