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Finding the Fourth Proportional to 640.81, 884.23 and 375.23

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Solution

The fourth proportional to 640.81, 884.23 and 375.23 is: 517.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.81 : 884.23 = 375.23 : x
  2. Step 2: Convert to fraction form
    640.81/884.23 = 375.23/x
  3. Step 3: Cross multiply
    640.81x = 884.23 × 375.23
  4. Step 4: Simplify right side
    640.81x = 331,790.90
  5. Step 5: Solve for x
    x = 331,790.90/640.81
  6. Step 6: Final answer
    x = 517.77

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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.