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Finding the Fourth Proportional to 982.80, 1,350 and 953.64

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Solution

The fourth proportional to 982.80, 1,350 and 953.64 is: 1,309.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.80 : 1,350 = 953.64 : x
  2. Step 2: Convert to fraction form
    982.80/1,350 = 953.64/x
  3. Step 3: Cross multiply
    982.80x = 1,350 × 953.64
  4. Step 4: Simplify right side
    982.80x = 1,287,414
  5. Step 5: Solve for x
    x = 1,287,414/982.80
  6. Step 6: Final answer
    x = 1,309.95

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.