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Finding the Fourth Proportional to 451.82, 621.48 and 377.09

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Solution

The fourth proportional to 451.82, 621.48 and 377.09 is: 518.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.82 : 621.48 = 377.09 : x
  2. Step 2: Convert to fraction form
    451.82/621.48 = 377.09/x
  3. Step 3: Cross multiply
    451.82x = 621.48 × 377.09
  4. Step 4: Simplify right side
    451.82x = 234,350.79
  5. Step 5: Solve for x
    x = 234,350.79/451.82
  6. Step 6: Final answer
    x = 518.69

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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.