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Finding the Fourth Proportional to 2,878.94, 3,972.84 and 1,620.02

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Solution

The fourth proportional to 2,878.94, 3,972.84 and 1,620.02 is: 2,235.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.94 : 3,972.84 = 1,620.02 : x
  2. Step 2: Convert to fraction form
    2,878.94/3,972.84 = 1,620.02/x
  3. Step 3: Cross multiply
    2,878.94x = 3,972.84 × 1,620.02
  4. Step 4: Simplify right side
    2,878.94x = 6,436,080.26
  5. Step 5: Solve for x
    x = 6,436,080.26/2,878.94
  6. Step 6: Final answer
    x = 2,235.57

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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.