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Finding the Fourth Proportional to 264.60, 396.60 and 142.68

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Solution

The fourth proportional to 264.60, 396.60 and 142.68 is: 213.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.60 : 396.60 = 142.68 : x
  2. Step 2: Convert to fraction form
    264.60/396.60 = 142.68/x
  3. Step 3: Cross multiply
    264.60x = 396.60 × 142.68
  4. Step 4: Simplify right side
    264.60x = 56,586.89
  5. Step 5: Solve for x
    x = 56,586.89/264.60
  6. Step 6: Final answer
    x = 213.86

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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.