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Finding the Fourth Proportional to 2,878.56, 3,972.21 and 1,619.22

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Solution

The fourth proportional to 2,878.56, 3,972.21 and 1,619.22 is: 2,234.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.56 : 3,972.21 = 1,619.22 : x
  2. Step 2: Convert to fraction form
    2,878.56/3,972.21 = 1,619.22/x
  3. Step 3: Cross multiply
    2,878.56x = 3,972.21 × 1,619.22
  4. Step 4: Simplify right side
    2,878.56x = 6,431,881.88
  5. Step 5: Solve for x
    x = 6,431,881.88/2,878.56
  6. Step 6: Final answer
    x = 2,234.41

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1.5x scale

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.