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Finding the Fourth Proportional to 303.21, 454.75 and 187.65

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Solution

The fourth proportional to 303.21, 454.75 and 187.65 is: 281.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.21 : 454.75 = 187.65 : x
  2. Step 2: Convert to fraction form
    303.21/454.75 = 187.65/x
  3. Step 3: Cross multiply
    303.21x = 454.75 × 187.65
  4. Step 4: Simplify right side
    303.21x = 85,333.37
  5. Step 5: Solve for x
    x = 85,333.37/303.21
  6. Step 6: Final answer
    x = 281.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.