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Finding the Fourth Proportional to 623.99, 860.91 and 361.91

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Solution

The fourth proportional to 623.99, 860.91 and 361.91 is: 499.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.99 : 860.91 = 361.91 : x
  2. Step 2: Convert to fraction form
    623.99/860.91 = 361.91/x
  3. Step 3: Cross multiply
    623.99x = 860.91 × 361.91
  4. Step 4: Simplify right side
    623.99x = 311,571.94
  5. Step 5: Solve for x
    x = 311,571.94/623.99
  6. Step 6: Final answer
    x = 499.32

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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.