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Finding the Fourth Proportional to 3,952.80, 5,921.40 and 2,006.40

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Solution

The fourth proportional to 3,952.80, 5,921.40 and 2,006.40 is: 3,005.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,952.80 : 5,921.40 = 2,006.40 : x
  2. Step 2: Convert to fraction form
    3,952.80/5,921.40 = 2,006.40/x
  3. Step 3: Cross multiply
    3,952.80x = 5,921.40 × 2,006.40
  4. Step 4: Simplify right side
    3,952.80x = 11,880,696.96
  5. Step 5: Solve for x
    x = 11,880,696.96/3,952.80
  6. Step 6: Final answer
    x = 3,005.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.