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Finding the Fourth Proportional to 623.99, 861.18 and 361.95

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Solution

The fourth proportional to 623.99, 861.18 and 361.95 is: 499.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.99 : 861.18 = 361.95 : x
  2. Step 2: Convert to fraction form
    623.99/861.18 = 361.95/x
  3. Step 3: Cross multiply
    623.99x = 861.18 × 361.95
  4. Step 4: Simplify right side
    623.99x = 311,704.10
  5. Step 5: Solve for x
    x = 311,704.10/623.99
  6. Step 6: Final answer
    x = 499.53

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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.