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Finding the Fourth Proportional to 626.39, 936.84 and 511.57

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Solution

The fourth proportional to 626.39, 936.84 and 511.57 is: 765.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.39 : 936.84 = 511.57 : x
  2. Step 2: Convert to fraction form
    626.39/936.84 = 511.57/x
  3. Step 3: Cross multiply
    626.39x = 936.84 × 511.57
  4. Step 4: Simplify right side
    626.39x = 479,259.24
  5. Step 5: Solve for x
    x = 479,259.24/626.39
  6. Step 6: Final answer
    x = 765.11

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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.