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Finding the Fourth Proportional to 621.88, 930.96 and 377.68

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Solution

The fourth proportional to 621.88, 930.96 and 377.68 is: 565.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.88 : 930.96 = 377.68 : x
  2. Step 2: Convert to fraction form
    621.88/930.96 = 377.68/x
  3. Step 3: Cross multiply
    621.88x = 930.96 × 377.68
  4. Step 4: Simplify right side
    621.88x = 351,604.97
  5. Step 5: Solve for x
    x = 351,604.97/621.88
  6. Step 6: Final answer
    x = 565.39

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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.