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Finding the Fourth Proportional to 619.86, 930.06 and 327.60

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Solution

The fourth proportional to 619.86, 930.06 and 327.60 is: 491.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.86 : 930.06 = 327.60 : x
  2. Step 2: Convert to fraction form
    619.86/930.06 = 327.60/x
  3. Step 3: Cross multiply
    619.86x = 930.06 × 327.60
  4. Step 4: Simplify right side
    619.86x = 304,687.66
  5. Step 5: Solve for x
    x = 304,687.66/619.86
  6. Step 6: Final answer
    x = 491.54

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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.