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Finding the Fourth Proportional to 2,636.64, 3,952.10 and 1,338.20

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Solution

The fourth proportional to 2,636.64, 3,952.10 and 1,338.20 is: 2,005.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,636.64 : 3,952.10 = 1,338.20 : x
  2. Step 2: Convert to fraction form
    2,636.64/3,952.10 = 1,338.20/x
  3. Step 3: Cross multiply
    2,636.64x = 3,952.10 × 1,338.20
  4. Step 4: Simplify right side
    2,636.64x = 5,288,700.22
  5. Step 5: Solve for x
    x = 5,288,700.22/2,636.64
  6. Step 6: Final answer
    x = 2,005.85

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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.