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Finding the Fourth Proportional to 511.11, 766.98 and 328.62

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Solution

The fourth proportional to 511.11, 766.98 and 328.62 is: 493.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.11 : 766.98 = 328.62 : x
  2. Step 2: Convert to fraction form
    511.11/766.98 = 328.62/x
  3. Step 3: Cross multiply
    511.11x = 766.98 × 328.62
  4. Step 4: Simplify right side
    511.11x = 252,044.97
  5. Step 5: Solve for x
    x = 252,044.97/511.11
  6. Step 6: Final answer
    x = 493.13

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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.