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Finding the Fourth Proportional to 218.03, 300.59 and 186.81

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Solution

The fourth proportional to 218.03, 300.59 and 186.81 is: 257.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.03 : 300.59 = 186.81 : x
  2. Step 2: Convert to fraction form
    218.03/300.59 = 186.81/x
  3. Step 3: Cross multiply
    218.03x = 300.59 × 186.81
  4. Step 4: Simplify right side
    218.03x = 56,152.98
  5. Step 5: Solve for x
    x = 56,152.98/218.03
  6. Step 6: Final answer
    x = 257.55

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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.