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Finding the Fourth Proportional to 450.78, 621.81 and 273.66

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Solution

The fourth proportional to 450.78, 621.81 and 273.66 is: 377.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.78 : 621.81 = 273.66 : x
  2. Step 2: Convert to fraction form
    450.78/621.81 = 273.66/x
  3. Step 3: Cross multiply
    450.78x = 621.81 × 273.66
  4. Step 4: Simplify right side
    450.78x = 170,161.42
  5. Step 5: Solve for x
    x = 170,161.42/450.78
  6. Step 6: Final answer
    x = 377.49

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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.