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Finding the Fourth Proportional to 635.14, 876.60 and 618.49

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Solution

The fourth proportional to 635.14, 876.60 and 618.49 is: 853.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.14 : 876.60 = 618.49 : x
  2. Step 2: Convert to fraction form
    635.14/876.60 = 618.49/x
  3. Step 3: Cross multiply
    635.14x = 876.60 × 618.49
  4. Step 4: Simplify right side
    635.14x = 542,163.95
  5. Step 5: Solve for x
    x = 542,163.95/635.14
  6. Step 6: Final answer
    x = 853.61

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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.