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Finding the Fourth Proportional to 303.12, 451.82 and 287.73

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Solution

The fourth proportional to 303.12, 451.82 and 287.73 is: 428.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.12 : 451.82 = 287.73 : x
  2. Step 2: Convert to fraction form
    303.12/451.82 = 287.73/x
  3. Step 3: Cross multiply
    303.12x = 451.82 × 287.73
  4. Step 4: Simplify right side
    303.12x = 130,002.89
  5. Step 5: Solve for x
    x = 130,002.89/303.12
  6. Step 6: Final answer
    x = 428.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.