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Finding the Fourth Proportional to 982.63, 1,354.34 and 936.49

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Solution

The fourth proportional to 982.63, 1,354.34 and 936.49 is: 1,290.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.63 : 1,354.34 = 936.49 : x
  2. Step 2: Convert to fraction form
    982.63/1,354.34 = 936.49/x
  3. Step 3: Cross multiply
    982.63x = 1,354.34 × 936.49
  4. Step 4: Simplify right side
    982.63x = 1,268,325.87
  5. Step 5: Solve for x
    x = 1,268,325.87/982.63
  6. Step 6: Final answer
    x = 1,290.75

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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.