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Finding the Fourth Proportional to 636.54, 878.40 and 370.98

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Solution

The fourth proportional to 636.54, 878.40 and 370.98 is: 511.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.54 : 878.40 = 370.98 : x
  2. Step 2: Convert to fraction form
    636.54/878.40 = 370.98/x
  3. Step 3: Cross multiply
    636.54x = 878.40 × 370.98
  4. Step 4: Simplify right side
    636.54x = 325,868.83
  5. Step 5: Solve for x
    x = 325,868.83/636.54
  6. Step 6: Final answer
    x = 511.94

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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.