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Finding the Fourth Proportional to 3,908.66, 5,416.58 and 3,834.84

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Solution

The fourth proportional to 3,908.66, 5,416.58 and 3,834.84 is: 5,314.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.66 : 5,416.58 = 3,834.84 : x
  2. Step 2: Convert to fraction form
    3,908.66/5,416.58 = 3,834.84/x
  3. Step 3: Cross multiply
    3,908.66x = 5,416.58 × 3,834.84
  4. Step 4: Simplify right side
    3,908.66x = 20,771,717.65
  5. Step 5: Solve for x
    x = 20,771,717.65/3,908.66
  6. Step 6: Final answer
    x = 5,314.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.