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Finding the Fourth Proportional to 3,678.96, 5,518.89 and 1,214.22

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Solution

The fourth proportional to 3,678.96, 5,518.89 and 1,214.22 is: 1,821.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.96 : 5,518.89 = 1,214.22 : x
  2. Step 2: Convert to fraction form
    3,678.96/5,518.89 = 1,214.22/x
  3. Step 3: Cross multiply
    3,678.96x = 5,518.89 × 1,214.22
  4. Step 4: Simplify right side
    3,678.96x = 6,701,146.62
  5. Step 5: Solve for x
    x = 6,701,146.62/3,678.96
  6. Step 6: Final answer
    x = 1,821.48

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1.5x scale

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.