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Finding the Fourth Proportional to 636, 877.68 and 360

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Solution

The fourth proportional to 636, 877.68 and 360 is: 496.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    636 : 877.68 = 360 : x
  2. Step 2: Convert to fraction form
    636/877.68 = 360/x
  3. Step 3: Cross multiply
    636x = 877.68 × 360
  4. Step 4: Simplify right side
    636x = 315,964.80
  5. Step 5: Solve for x
    x = 315,964.80/636
  6. Step 6: Final answer
    x = 496.80

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.