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Finding the Fourth Proportional to 2,106.62, 3,161.34 and 874.01

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Solution

The fourth proportional to 2,106.62, 3,161.34 and 874.01 is: 1,311.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,106.62 : 3,161.34 = 874.01 : x
  2. Step 2: Convert to fraction form
    2,106.62/3,161.34 = 874.01/x
  3. Step 3: Cross multiply
    2,106.62x = 3,161.34 × 874.01
  4. Step 4: Simplify right side
    2,106.62x = 2,763,042.77
  5. Step 5: Solve for x
    x = 2,763,042.77/2,106.62
  6. Step 6: Final answer
    x = 1,311.60

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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.