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Finding the Fourth Proportional to 623.82, 860.77 and 361.78

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Solution

The fourth proportional to 623.82, 860.77 and 361.78 is: 499.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.82 : 860.77 = 361.78 : x
  2. Step 2: Convert to fraction form
    623.82/860.77 = 361.78/x
  3. Step 3: Cross multiply
    623.82x = 860.77 × 361.78
  4. Step 4: Simplify right side
    623.82x = 311,409.37
  5. Step 5: Solve for x
    x = 311,409.37/623.82
  6. Step 6: Final answer
    x = 499.20

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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.