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Finding the Fourth Proportional to 636.70, 878.44 and 371.02

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Solution

The fourth proportional to 636.70, 878.44 and 371.02 is: 511.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.70 : 878.44 = 371.02 : x
  2. Step 2: Convert to fraction form
    636.70/878.44 = 371.02/x
  3. Step 3: Cross multiply
    636.70x = 878.44 × 371.02
  4. Step 4: Simplify right side
    636.70x = 325,918.81
  5. Step 5: Solve for x
    x = 325,918.81/636.70
  6. Step 6: Final answer
    x = 511.89

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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.