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Finding the Fourth Proportional to 265.17, 396.70 and 219.61

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Solution

The fourth proportional to 265.17, 396.70 and 219.61 is: 328.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.17 : 396.70 = 219.61 : x
  2. Step 2: Convert to fraction form
    265.17/396.70 = 219.61/x
  3. Step 3: Cross multiply
    265.17x = 396.70 × 219.61
  4. Step 4: Simplify right side
    265.17x = 87,119.23
  5. Step 5: Solve for x
    x = 87,119.23/265.17
  6. Step 6: Final answer
    x = 328.54

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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.