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Finding the Fourth Proportional to 218.61, 301.53 and 144.81

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Solution

The fourth proportional to 218.61, 301.53 and 144.81 is: 199.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.61 : 301.53 = 144.81 : x
  2. Step 2: Convert to fraction form
    218.61/301.53 = 144.81/x
  3. Step 3: Cross multiply
    218.61x = 301.53 × 144.81
  4. Step 4: Simplify right side
    218.61x = 43,664.56
  5. Step 5: Solve for x
    x = 43,664.56/218.61
  6. Step 6: Final answer
    x = 199.74

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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.