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Finding the Fourth Proportional to 3,191.53, 4,797.06 and 2,647.21

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Solution

The fourth proportional to 3,191.53, 4,797.06 and 2,647.21 is: 3,978.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,191.53 : 4,797.06 = 2,647.21 : x
  2. Step 2: Convert to fraction form
    3,191.53/4,797.06 = 2,647.21/x
  3. Step 3: Cross multiply
    3,191.53x = 4,797.06 × 2,647.21
  4. Step 4: Simplify right side
    3,191.53x = 12,698,825.20
  5. Step 5: Solve for x
    x = 12,698,825.20/3,191.53
  6. Step 6: Final answer
    x = 3,978.91

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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.