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Finding the Fourth Proportional to 301.87, 416.79 and 189.89

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Solution

The fourth proportional to 301.87, 416.79 and 189.89 is: 262.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.87 : 416.79 = 189.89 : x
  2. Step 2: Convert to fraction form
    301.87/416.79 = 189.89/x
  3. Step 3: Cross multiply
    301.87x = 416.79 × 189.89
  4. Step 4: Simplify right side
    301.87x = 79,144.25
  5. Step 5: Solve for x
    x = 79,144.25/301.87
  6. Step 6: Final answer
    x = 262.18

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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.