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Finding the Fourth Proportional to 3,660.79, 5,051.85 and 1,982.15

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Solution

The fourth proportional to 3,660.79, 5,051.85 and 1,982.15 is: 2,735.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,660.79 : 5,051.85 = 1,982.15 : x
  2. Step 2: Convert to fraction form
    3,660.79/5,051.85 = 1,982.15/x
  3. Step 3: Cross multiply
    3,660.79x = 5,051.85 × 1,982.15
  4. Step 4: Simplify right side
    3,660.79x = 10,013,524.48
  5. Step 5: Solve for x
    x = 10,013,524.48/3,660.79
  6. Step 6: Final answer
    x = 2,735.35

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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.