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Finding the Fourth Proportional to 635.04, 879.66 and 622.08

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Solution

The fourth proportional to 635.04, 879.66 and 622.08 is: 861.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.04 : 879.66 = 622.08 : x
  2. Step 2: Convert to fraction form
    635.04/879.66 = 622.08/x
  3. Step 3: Cross multiply
    635.04x = 879.66 × 622.08
  4. Step 4: Simplify right side
    635.04x = 547,218.89
  5. Step 5: Solve for x
    x = 547,218.89/635.04
  6. Step 6: Final answer
    x = 861.71

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.