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Finding the Fourth Proportional to 511.25, 766.55 and 338.00

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Solution

The fourth proportional to 511.25, 766.55 and 338.00 is: 506.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.25 : 766.55 = 338.00 : x
  2. Step 2: Convert to fraction form
    511.25/766.55 = 338.00/x
  3. Step 3: Cross multiply
    511.25x = 766.55 × 338.00
  4. Step 4: Simplify right side
    511.25x = 259,088.38
  5. Step 5: Solve for x
    x = 259,088.38/511.25
  6. Step 6: Final answer
    x = 506.78

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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.