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Finding the Fourth Proportional to 626.76, 939.42 and 511.38

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Solution

The fourth proportional to 626.76, 939.42 and 511.38 is: 766.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.76 : 939.42 = 511.38 : x
  2. Step 2: Convert to fraction form
    626.76/939.42 = 511.38/x
  3. Step 3: Cross multiply
    626.76x = 939.42 × 511.38
  4. Step 4: Simplify right side
    626.76x = 480,400.60
  5. Step 5: Solve for x
    x = 480,400.60/626.76
  6. Step 6: Final answer
    x = 766.48

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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.