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Finding the Fourth Proportional to 327.86, 489.63 and 262.96

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Solution

The fourth proportional to 327.86, 489.63 and 262.96 is: 392.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.86 : 489.63 = 262.96 : x
  2. Step 2: Convert to fraction form
    327.86/489.63 = 262.96/x
  3. Step 3: Cross multiply
    327.86x = 489.63 × 262.96
  4. Step 4: Simplify right side
    327.86x = 128,750.66
  5. Step 5: Solve for x
    x = 128,750.66/327.86
  6. Step 6: Final answer
    x = 392.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.