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Finding the Fourth Proportional to 3,469.79, 4,786.98 and 2,141.21

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Solution

The fourth proportional to 3,469.79, 4,786.98 and 2,141.21 is: 2,954.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,469.79 : 4,786.98 = 2,141.21 : x
  2. Step 2: Convert to fraction form
    3,469.79/4,786.98 = 2,141.21/x
  3. Step 3: Cross multiply
    3,469.79x = 4,786.98 × 2,141.21
  4. Step 4: Simplify right side
    3,469.79x = 10,249,929.45
  5. Step 5: Solve for x
    x = 10,249,929.45/3,469.79
  6. Step 6: Final answer
    x = 2,954.05

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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.