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Finding the Fourth Proportional to 511.48, 766.68 and 251.11

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Solution

The fourth proportional to 511.48, 766.68 and 251.11 is: 376.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.48 : 766.68 = 251.11 : x
  2. Step 2: Convert to fraction form
    511.48/766.68 = 251.11/x
  3. Step 3: Cross multiply
    511.48x = 766.68 × 251.11
  4. Step 4: Simplify right side
    511.48x = 192,521.01
  5. Step 5: Solve for x
    x = 192,521.01/511.48
  6. Step 6: Final answer
    x = 376.40

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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.