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Finding the Fourth Proportional to 451.16, 622.65 and 276.54

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Solution

The fourth proportional to 451.16, 622.65 and 276.54 is: 381.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.16 : 622.65 = 276.54 : x
  2. Step 2: Convert to fraction form
    451.16/622.65 = 276.54/x
  3. Step 3: Cross multiply
    451.16x = 622.65 × 276.54
  4. Step 4: Simplify right side
    451.16x = 172,187.63
  5. Step 5: Solve for x
    x = 172,187.63/451.16
  6. Step 6: Final answer
    x = 381.66

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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.