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Finding the Fourth Proportional to 3,469.42, 5,206.16 and 1,390.42

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Solution

The fourth proportional to 3,469.42, 5,206.16 and 1,390.42 is: 2,086.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,469.42 : 5,206.16 = 1,390.42 : x
  2. Step 2: Convert to fraction form
    3,469.42/5,206.16 = 1,390.42/x
  3. Step 3: Cross multiply
    3,469.42x = 5,206.16 × 1,390.42
  4. Step 4: Simplify right side
    3,469.42x = 7,238,748.99
  5. Step 5: Solve for x
    x = 7,238,748.99/3,469.42
  6. Step 6: Final answer
    x = 2,086.44

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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.