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Finding the Fourth Proportional to 360.98, 498.22 and 213.60

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Solution

The fourth proportional to 360.98, 498.22 and 213.60 is: 294.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.98 : 498.22 = 213.60 : x
  2. Step 2: Convert to fraction form
    360.98/498.22 = 213.60/x
  3. Step 3: Cross multiply
    360.98x = 498.22 × 213.60
  4. Step 4: Simplify right side
    360.98x = 106,419.79
  5. Step 5: Solve for x
    x = 106,419.79/360.98
  6. Step 6: Final answer
    x = 294.81

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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.