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Finding the Fourth Proportional to 3,969.84, 5,478.41 and 2,201.45

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Solution

The fourth proportional to 3,969.84, 5,478.41 and 2,201.45 is: 3,038.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.84 : 5,478.41 = 2,201.45 : x
  2. Step 2: Convert to fraction form
    3,969.84/5,478.41 = 2,201.45/x
  3. Step 3: Cross multiply
    3,969.84x = 5,478.41 × 2,201.45
  4. Step 4: Simplify right side
    3,969.84x = 12,060,463.84
  5. Step 5: Solve for x
    x = 12,060,463.84/3,969.84
  6. Step 6: Final answer
    x = 3,038.02

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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.