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Finding the Fourth Proportional to 2,690.44, 3,713.70 and 1,808.68

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Solution

The fourth proportional to 2,690.44, 3,713.70 and 1,808.68 is: 2,496.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.44 : 3,713.70 = 1,808.68 : x
  2. Step 2: Convert to fraction form
    2,690.44/3,713.70 = 1,808.68/x
  3. Step 3: Cross multiply
    2,690.44x = 3,713.70 × 1,808.68
  4. Step 4: Simplify right side
    2,690.44x = 6,716,894.92
  5. Step 5: Solve for x
    x = 6,716,894.92/2,690.44
  6. Step 6: Final answer
    x = 2,496.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.