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Finding the Fourth Proportional to 620.44, 930.76 and 187.56

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Solution

The fourth proportional to 620.44, 930.76 and 187.56 is: 281.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.44 : 930.76 = 187.56 : x
  2. Step 2: Convert to fraction form
    620.44/930.76 = 187.56/x
  3. Step 3: Cross multiply
    620.44x = 930.76 × 187.56
  4. Step 4: Simplify right side
    620.44x = 174,573.35
  5. Step 5: Solve for x
    x = 174,573.35/620.44
  6. Step 6: Final answer
    x = 281.37

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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.