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Finding the Fourth Proportional to 451.22, 622.68 and 276.57

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Solution

The fourth proportional to 451.22, 622.68 and 276.57 is: 381.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.22 : 622.68 = 276.57 : x
  2. Step 2: Convert to fraction form
    451.22/622.68 = 276.57/x
  3. Step 3: Cross multiply
    451.22x = 622.68 × 276.57
  4. Step 4: Simplify right side
    451.22x = 172,214.61
  5. Step 5: Solve for x
    x = 172,214.61/451.22
  6. Step 6: Final answer
    x = 381.67

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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.