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Finding the Fourth Proportional to 621.41, 930.99 and 274.56

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Solution

The fourth proportional to 621.41, 930.99 and 274.56 is: 411.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.41 : 930.99 = 274.56 : x
  2. Step 2: Convert to fraction form
    621.41/930.99 = 274.56/x
  3. Step 3: Cross multiply
    621.41x = 930.99 × 274.56
  4. Step 4: Simplify right side
    621.41x = 255,610.15
  5. Step 5: Solve for x
    x = 255,610.15/621.41
  6. Step 6: Final answer
    x = 411.34

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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.