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Finding the Fourth Proportional to 218.30, 300.93 and 144.50

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Solution

The fourth proportional to 218.30, 300.93 and 144.50 is: 199.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.30 : 300.93 = 144.50 : x
  2. Step 2: Convert to fraction form
    218.30/300.93 = 144.50/x
  3. Step 3: Cross multiply
    218.30x = 300.93 × 144.50
  4. Step 4: Simplify right side
    218.30x = 43,484.39
  5. Step 5: Solve for x
    x = 43,484.39/218.30
  6. Step 6: Final answer
    x = 199.20

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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.