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Finding the Fourth Proportional to 348.18, 480.34 and 216.96

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Solution

The fourth proportional to 348.18, 480.34 and 216.96 is: 299.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.18 : 480.34 = 216.96 : x
  2. Step 2: Convert to fraction form
    348.18/480.34 = 216.96/x
  3. Step 3: Cross multiply
    348.18x = 480.34 × 216.96
  4. Step 4: Simplify right side
    348.18x = 104,214.57
  5. Step 5: Solve for x
    x = 104,214.57/348.18
  6. Step 6: Final answer
    x = 299.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.