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Finding the Fourth Proportional to 2,622.85, 3,620.90 and 1,680.01

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Solution

The fourth proportional to 2,622.85, 3,620.90 and 1,680.01 is: 2,319.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,622.85 : 3,620.90 = 1,680.01 : x
  2. Step 2: Convert to fraction form
    2,622.85/3,620.90 = 1,680.01/x
  3. Step 3: Cross multiply
    2,622.85x = 3,620.90 × 1,680.01
  4. Step 4: Simplify right side
    2,622.85x = 6,083,143.36
  5. Step 5: Solve for x
    x = 6,083,143.36/2,622.85
  6. Step 6: Final answer
    x = 2,319.29

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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.