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Finding the Fourth Proportional to 511.49, 766.90 and 306.09

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Solution

The fourth proportional to 511.49, 766.90 and 306.09 is: 458.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.49 : 766.90 = 306.09 : x
  2. Step 2: Convert to fraction form
    511.49/766.90 = 306.09/x
  3. Step 3: Cross multiply
    511.49x = 766.90 × 306.09
  4. Step 4: Simplify right side
    511.49x = 234,740.42
  5. Step 5: Solve for x
    x = 234,740.42/511.49
  6. Step 6: Final answer
    x = 458.93

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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.