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Finding the Fourth Proportional to 260.68, 360.18 and 218.62

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Solution

The fourth proportional to 260.68, 360.18 and 218.62 is: 302.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.68 : 360.18 = 218.62 : x
  2. Step 2: Convert to fraction form
    260.68/360.18 = 218.62/x
  3. Step 3: Cross multiply
    260.68x = 360.18 × 218.62
  4. Step 4: Simplify right side
    260.68x = 78,742.55
  5. Step 5: Solve for x
    x = 78,742.55/260.68
  6. Step 6: Final answer
    x = 302.07

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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.