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Finding the Fourth Proportional to 619.92, 930.30 and 254.82

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Solution

The fourth proportional to 619.92, 930.30 and 254.82 is: 382.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.92 : 930.30 = 254.82 : x
  2. Step 2: Convert to fraction form
    619.92/930.30 = 254.82/x
  3. Step 3: Cross multiply
    619.92x = 930.30 × 254.82
  4. Step 4: Simplify right side
    619.92x = 237,059.05
  5. Step 5: Solve for x
    x = 237,059.05/619.92
  6. Step 6: Final answer
    x = 382.40

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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.