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Finding the Fourth Proportional to 451.23, 622.47 and 276.67

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Solution

The fourth proportional to 451.23, 622.47 and 276.67 is: 381.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.23 : 622.47 = 276.67 : x
  2. Step 2: Convert to fraction form
    451.23/622.47 = 276.67/x
  3. Step 3: Cross multiply
    451.23x = 622.47 × 276.67
  4. Step 4: Simplify right side
    451.23x = 172,218.77
  5. Step 5: Solve for x
    x = 172,218.77/451.23
  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.