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Finding the Fourth Proportional to 644.88, 965.88 and 480.60

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Solution

The fourth proportional to 644.88, 965.88 and 480.60 is: 719.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.88 : 965.88 = 480.60 : x
  2. Step 2: Convert to fraction form
    644.88/965.88 = 480.60/x
  3. Step 3: Cross multiply
    644.88x = 965.88 × 480.60
  4. Step 4: Simplify right side
    644.88x = 464,201.93
  5. Step 5: Solve for x
    x = 464,201.93/644.88
  6. Step 6: Final answer
    x = 719.83

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.