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Finding the Fourth Proportional to 264.92, 395.70 and 221.30

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Solution

The fourth proportional to 264.92, 395.70 and 221.30 is: 330.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.92 : 395.70 = 221.30 : x
  2. Step 2: Convert to fraction form
    264.92/395.70 = 221.30/x
  3. Step 3: Cross multiply
    264.92x = 395.70 × 221.30
  4. Step 4: Simplify right side
    264.92x = 87,568.41
  5. Step 5: Solve for x
    x = 87,568.41/264.92
  6. Step 6: Final answer
    x = 330.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.