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Finding the Fourth Proportional to 635.97, 877.06 and 399.94

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Solution

The fourth proportional to 635.97, 877.06 and 399.94 is: 551.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.97 : 877.06 = 399.94 : x
  2. Step 2: Convert to fraction form
    635.97/877.06 = 399.94/x
  3. Step 3: Cross multiply
    635.97x = 877.06 × 399.94
  4. Step 4: Simplify right side
    635.97x = 350,771.38
  5. Step 5: Solve for x
    x = 350,771.38/635.97
  6. Step 6: Final answer
    x = 551.55

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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.