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Finding the Fourth Proportional to 934.13, 1,286.27 and 809.80

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Solution

The fourth proportional to 934.13, 1,286.27 and 809.80 is: 1,115.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.13 : 1,286.27 = 809.80 : x
  2. Step 2: Convert to fraction form
    934.13/1,286.27 = 809.80/x
  3. Step 3: Cross multiply
    934.13x = 1,286.27 × 809.80
  4. Step 4: Simplify right side
    934.13x = 1,041,621.45
  5. Step 5: Solve for x
    x = 1,041,621.45/934.13
  6. Step 6: Final answer
    x = 1,115.07

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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.