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Finding the Fourth Proportional to 511.36, 765.76 and 306.08

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Solution

The fourth proportional to 511.36, 765.76 and 306.08 is: 458.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.36 : 765.76 = 306.08 : x
  2. Step 2: Convert to fraction form
    511.36/765.76 = 306.08/x
  3. Step 3: Cross multiply
    511.36x = 765.76 × 306.08
  4. Step 4: Simplify right side
    511.36x = 234,383.82
  5. Step 5: Solve for x
    x = 234,383.82/511.36
  6. Step 6: Final answer
    x = 458.35

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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.