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Finding the Fourth Proportional to 623.89, 860.79 and 361.86

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Solution

The fourth proportional to 623.89, 860.79 and 361.86 is: 499.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.89 : 860.79 = 361.86 : x
  2. Step 2: Convert to fraction form
    623.89/860.79 = 361.86/x
  3. Step 3: Cross multiply
    623.89x = 860.79 × 361.86
  4. Step 4: Simplify right side
    623.89x = 311,485.47
  5. Step 5: Solve for x
    x = 311,485.47/623.89
  6. Step 6: Final answer
    x = 499.26

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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.