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Finding the Fourth Proportional to 511.40, 766.02 and 327.86

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Solution

The fourth proportional to 511.40, 766.02 and 327.86 is: 491.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.40 : 766.02 = 327.86 : x
  2. Step 2: Convert to fraction form
    511.40/766.02 = 327.86/x
  3. Step 3: Cross multiply
    511.40x = 766.02 × 327.86
  4. Step 4: Simplify right side
    511.40x = 251,149.23
  5. Step 5: Solve for x
    x = 251,149.23/511.40
  6. Step 6: Final answer
    x = 491.11

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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.