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Finding the Fourth Proportional to 3,959.63, 5,463.81 and 2,190.99

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Solution

The fourth proportional to 3,959.63, 5,463.81 and 2,190.99 is: 3,023.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.63 : 5,463.81 = 2,190.99 : x
  2. Step 2: Convert to fraction form
    3,959.63/5,463.81 = 2,190.99/x
  3. Step 3: Cross multiply
    3,959.63x = 5,463.81 × 2,190.99
  4. Step 4: Simplify right side
    3,959.63x = 11,971,153.07
  5. Step 5: Solve for x
    x = 11,971,153.07/3,959.63
  6. Step 6: Final answer
    x = 3,023.30

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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.