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Finding the Fourth Proportional to 450.78, 622.05 and 276.18

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Solution

The fourth proportional to 450.78, 622.05 and 276.18 is: 381.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.78 : 622.05 = 276.18 : x
  2. Step 2: Convert to fraction form
    450.78/622.05 = 276.18/x
  3. Step 3: Cross multiply
    450.78x = 622.05 × 276.18
  4. Step 4: Simplify right side
    450.78x = 171,797.77
  5. Step 5: Solve for x
    x = 171,797.77/450.78
  6. Step 6: Final answer
    x = 381.11

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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.