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Finding the Fourth Proportional to 3,214.36, 4,821.58 and 874.48

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Solution

The fourth proportional to 3,214.36, 4,821.58 and 874.48 is: 1,311.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,214.36 : 4,821.58 = 874.48 : x
  2. Step 2: Convert to fraction form
    3,214.36/4,821.58 = 874.48/x
  3. Step 3: Cross multiply
    3,214.36x = 4,821.58 × 874.48
  4. Step 4: Simplify right side
    3,214.36x = 4,216,375.28
  5. Step 5: Solve for x
    x = 4,216,375.28/3,214.36
  6. Step 6: Final answer
    x = 1,311.73

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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.