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Finding the Fourth Proportional to 3,636.72, 5,455.74 and 2,078.48

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Solution

The fourth proportional to 3,636.72, 5,455.74 and 2,078.48 is: 3,118.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,636.72 : 5,455.74 = 2,078.48 : x
  2. Step 2: Convert to fraction form
    3,636.72/5,455.74 = 2,078.48/x
  3. Step 3: Cross multiply
    3,636.72x = 5,455.74 × 2,078.48
  4. Step 4: Simplify right side
    3,636.72x = 11,339,646.48
  5. Step 5: Solve for x
    x = 11,339,646.48/3,636.72
  6. Step 6: Final answer
    x = 3,118.10

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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.