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Finding the Fourth Proportional to 799.94, 1,194.40 and 678.26

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Solution

The fourth proportional to 799.94, 1,194.40 and 678.26 is: 1,012.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.94 : 1,194.40 = 678.26 : x
  2. Step 2: Convert to fraction form
    799.94/1,194.40 = 678.26/x
  3. Step 3: Cross multiply
    799.94x = 1,194.40 × 678.26
  4. Step 4: Simplify right side
    799.94x = 810,113.74
  5. Step 5: Solve for x
    x = 810,113.74/799.94
  6. Step 6: Final answer
    x = 1,012.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.