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Finding the Fourth Proportional to 217.86, 300.60 and 144.35

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Solution

The fourth proportional to 217.86, 300.60 and 144.35 is: 199.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.86 : 300.60 = 144.35 : x
  2. Step 2: Convert to fraction form
    217.86/300.60 = 144.35/x
  3. Step 3: Cross multiply
    217.86x = 300.60 × 144.35
  4. Step 4: Simplify right side
    217.86x = 43,390.11
  5. Step 5: Solve for x
    x = 43,390.11/217.86
  6. Step 6: Final answer
    x = 199.17

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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.