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Finding the Fourth Proportional to 3,975.66, 5,489.89 and 2,486.12

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Solution

The fourth proportional to 3,975.66, 5,489.89 and 2,486.12 is: 3,433.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,975.66 : 5,489.89 = 2,486.12 : x
  2. Step 2: Convert to fraction form
    3,975.66/5,489.89 = 2,486.12/x
  3. Step 3: Cross multiply
    3,975.66x = 5,489.89 × 2,486.12
  4. Step 4: Simplify right side
    3,975.66x = 13,648,491.66
  5. Step 5: Solve for x
    x = 13,648,491.66/3,975.66
  6. Step 6: Final answer
    x = 3,433.01

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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.