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Finding the Fourth Proportional to 3,485.62, 4,811.06 and 2,158.54

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Solution

The fourth proportional to 3,485.62, 4,811.06 and 2,158.54 is: 2,979.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,485.62 : 4,811.06 = 2,158.54 : x
  2. Step 2: Convert to fraction form
    3,485.62/4,811.06 = 2,158.54/x
  3. Step 3: Cross multiply
    3,485.62x = 4,811.06 × 2,158.54
  4. Step 4: Simplify right side
    3,485.62x = 10,384,865.45
  5. Step 5: Solve for x
    x = 10,384,865.45/3,485.62
  6. Step 6: Final answer
    x = 2,979.35

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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.