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Finding the Fourth Proportional to 1,252.20, 1,880.04 and 636.33

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Solution

The fourth proportional to 1,252.20, 1,880.04 and 636.33 is: 955.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252.20 : 1,880.04 = 636.33 : x
  2. Step 2: Convert to fraction form
    1,252.20/1,880.04 = 636.33/x
  3. Step 3: Cross multiply
    1,252.20x = 1,880.04 × 636.33
  4. Step 4: Simplify right side
    1,252.20x = 1,196,325.85
  5. Step 5: Solve for x
    x = 1,196,325.85/1,252.20
  6. Step 6: Final answer
    x = 955.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.