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Finding the Fourth Proportional to 3,656.70, 5,485.05 and 3,438.27

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Solution

The fourth proportional to 3,656.70, 5,485.05 and 3,438.27 is: 5,157.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,656.70 : 5,485.05 = 3,438.27 : x
  2. Step 2: Convert to fraction form
    3,656.70/5,485.05 = 3,438.27/x
  3. Step 3: Cross multiply
    3,656.70x = 5,485.05 × 3,438.27
  4. Step 4: Simplify right side
    3,656.70x = 18,859,082.86
  5. Step 5: Solve for x
    x = 18,859,082.86/3,656.70
  6. Step 6: Final answer
    x = 5,157.41

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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.