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Finding the Fourth Proportional to 300.84, 451.16 and 278.88

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Solution

The fourth proportional to 300.84, 451.16 and 278.88 is: 418.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.84 : 451.16 = 278.88 : x
  2. Step 2: Convert to fraction form
    300.84/451.16 = 278.88/x
  3. Step 3: Cross multiply
    300.84x = 451.16 × 278.88
  4. Step 4: Simplify right side
    300.84x = 125,819.50
  5. Step 5: Solve for x
    x = 125,819.50/300.84
  6. Step 6: Final answer
    x = 418.23

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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.