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Finding the Fourth Proportional to 264.56, 396.86 and 72.19

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Solution

The fourth proportional to 264.56, 396.86 and 72.19 is: 108.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.56 : 396.86 = 72.19 : x
  2. Step 2: Convert to fraction form
    264.56/396.86 = 72.19/x
  3. Step 3: Cross multiply
    264.56x = 396.86 × 72.19
  4. Step 4: Simplify right side
    264.56x = 28,647.97
  5. Step 5: Solve for x
    x = 28,647.97/264.56
  6. Step 6: Final answer
    x = 108.28

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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.