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Finding the Fourth Proportional to 511.40, 767.39 and 306.36

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Solution

The fourth proportional to 511.40, 767.39 and 306.36 is: 459.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.40 : 767.39 = 306.36 : x
  2. Step 2: Convert to fraction form
    511.40/767.39 = 306.36/x
  3. Step 3: Cross multiply
    511.40x = 767.39 × 306.36
  4. Step 4: Simplify right side
    511.40x = 235,096.07
  5. Step 5: Solve for x
    x = 235,096.07/511.40
  6. Step 6: Final answer
    x = 459.72

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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.