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Finding the Fourth Proportional to 5,078.77, 7,620.42 and 3,229.40

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Solution

The fourth proportional to 5,078.77, 7,620.42 and 3,229.40 is: 4,845.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.77 : 7,620.42 = 3,229.40 : x
  2. Step 2: Convert to fraction form
    5,078.77/7,620.42 = 3,229.40/x
  3. Step 3: Cross multiply
    5,078.77x = 7,620.42 × 3,229.40
  4. Step 4: Simplify right side
    5,078.77x = 24,609,384.35
  5. Step 5: Solve for x
    x = 24,609,384.35/5,078.77
  6. Step 6: Final answer
    x = 4,845.54

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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.