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Finding the Fourth Proportional to 3,885.66, 5,361.30 and 2,206.69

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Solution

The fourth proportional to 3,885.66, 5,361.30 and 2,206.69 is: 3,044.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,885.66 : 5,361.30 = 2,206.69 : x
  2. Step 2: Convert to fraction form
    3,885.66/5,361.30 = 2,206.69/x
  3. Step 3: Cross multiply
    3,885.66x = 5,361.30 × 2,206.69
  4. Step 4: Simplify right side
    3,885.66x = 11,830,713.69
  5. Step 5: Solve for x
    x = 11,830,713.69/3,885.66
  6. Step 6: Final answer
    x = 3,044.71

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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.