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Finding the Fourth Proportional to 3,114.25, 4,671.38 and 805.75

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Solution

The fourth proportional to 3,114.25, 4,671.38 and 805.75 is: 1,208.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,114.25 : 4,671.38 = 805.75 : x
  2. Step 2: Convert to fraction form
    3,114.25/4,671.38 = 805.75/x
  3. Step 3: Cross multiply
    3,114.25x = 4,671.38 × 805.75
  4. Step 4: Simplify right side
    3,114.25x = 3,763,964.44
  5. Step 5: Solve for x
    x = 3,763,964.44/3,114.25
  6. Step 6: Final answer
    x = 1,208.63

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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.