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Finding the Fourth Proportional to 218.34, 300.18 and 187.14

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Solution

The fourth proportional to 218.34, 300.18 and 187.14 is: 257.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.34 : 300.18 = 187.14 : x
  2. Step 2: Convert to fraction form
    218.34/300.18 = 187.14/x
  3. Step 3: Cross multiply
    218.34x = 300.18 × 187.14
  4. Step 4: Simplify right side
    218.34x = 56,175.69
  5. Step 5: Solve for x
    x = 56,175.69/218.34
  6. Step 6: Final answer
    x = 257.29

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.