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Finding the Fourth Proportional to 217.87, 300.65 and 124.60

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Solution

The fourth proportional to 217.87, 300.65 and 124.60 is: 171.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.87 : 300.65 = 124.60 : x
  2. Step 2: Convert to fraction form
    217.87/300.65 = 124.60/x
  3. Step 3: Cross multiply
    217.87x = 300.65 × 124.60
  4. Step 4: Simplify right side
    217.87x = 37,460.99
  5. Step 5: Solve for x
    x = 37,460.99/217.87
  6. Step 6: Final answer
    x = 171.94

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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.