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Finding the Fourth Proportional to 2,747.30, 4,121.64 and 799.70

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Solution

The fourth proportional to 2,747.30, 4,121.64 and 799.70 is: 1,199.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,747.30 : 4,121.64 = 799.70 : x
  2. Step 2: Convert to fraction form
    2,747.30/4,121.64 = 799.70/x
  3. Step 3: Cross multiply
    2,747.30x = 4,121.64 × 799.70
  4. Step 4: Simplify right side
    2,747.30x = 3,296,075.51
  5. Step 5: Solve for x
    x = 3,296,075.51/2,747.30
  6. Step 6: Final answer
    x = 1,199.75

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1.5x scale

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.