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Finding the Fourth Proportional to 640.83, 884.34 and 361.07

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Solution

The fourth proportional to 640.83, 884.34 and 361.07 is: 498.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.83 : 884.34 = 361.07 : x
  2. Step 2: Convert to fraction form
    640.83/884.34 = 361.07/x
  3. Step 3: Cross multiply
    640.83x = 884.34 × 361.07
  4. Step 4: Simplify right side
    640.83x = 319,304.22
  5. Step 5: Solve for x
    x = 319,304.22/640.83
  6. Step 6: Final answer
    x = 498.27

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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.