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Finding the Fourth Proportional to 3,449.70, 5,174.55 and 3,425.40

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Solution

The fourth proportional to 3,449.70, 5,174.55 and 3,425.40 is: 5,138.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,449.70 : 5,174.55 = 3,425.40 : x
  2. Step 2: Convert to fraction form
    3,449.70/5,174.55 = 3,425.40/x
  3. Step 3: Cross multiply
    3,449.70x = 5,174.55 × 3,425.40
  4. Step 4: Simplify right side
    3,449.70x = 17,724,903.57
  5. Step 5: Solve for x
    x = 17,724,903.57/3,449.70
  6. Step 6: Final answer
    x = 5,138.10

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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.