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Finding the Fourth Proportional to 3,438.62, 5,157.93 and 1,976.84

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Solution

The fourth proportional to 3,438.62, 5,157.93 and 1,976.84 is: 2,965.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,438.62 : 5,157.93 = 1,976.84 : x
  2. Step 2: Convert to fraction form
    3,438.62/5,157.93 = 1,976.84/x
  3. Step 3: Cross multiply
    3,438.62x = 5,157.93 × 1,976.84
  4. Step 4: Simplify right side
    3,438.62x = 10,196,376.55
  5. Step 5: Solve for x
    x = 10,196,376.55/3,438.62
  6. Step 6: Final answer
    x = 2,965.26

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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.