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Finding the Fourth Proportional to 2,600.91, 3,900.76 and 845.64

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Solution

The fourth proportional to 2,600.91, 3,900.76 and 845.64 is: 1,268.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,600.91 : 3,900.76 = 845.64 : x
  2. Step 2: Convert to fraction form
    2,600.91/3,900.76 = 845.64/x
  3. Step 3: Cross multiply
    2,600.91x = 3,900.76 × 845.64
  4. Step 4: Simplify right side
    2,600.91x = 3,298,636.57
  5. Step 5: Solve for x
    x = 3,298,636.57/2,600.91
  6. Step 6: Final answer
    x = 1,268.26

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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.