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Finding the Fourth Proportional to 3,397.70, 5,100.60 and 1,918.10

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Solution

The fourth proportional to 3,397.70, 5,100.60 and 1,918.10 is: 2,879.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,397.70 : 5,100.60 = 1,918.10 : x
  2. Step 2: Convert to fraction form
    3,397.70/5,100.60 = 1,918.10/x
  3. Step 3: Cross multiply
    3,397.70x = 5,100.60 × 1,918.10
  4. Step 4: Simplify right side
    3,397.70x = 9,783,460.86
  5. Step 5: Solve for x
    x = 9,783,460.86/3,397.70
  6. Step 6: Final answer
    x = 2,879.44

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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.