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Finding the Fourth Proportional to 3,408.90, 5,113.35 and 943.65

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Solution

The fourth proportional to 3,408.90, 5,113.35 and 943.65 is: 1,415.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,408.90 : 5,113.35 = 943.65 : x
  2. Step 2: Convert to fraction form
    3,408.90/5,113.35 = 943.65/x
  3. Step 3: Cross multiply
    3,408.90x = 5,113.35 × 943.65
  4. Step 4: Simplify right side
    3,408.90x = 4,825,212.73
  5. Step 5: Solve for x
    x = 4,825,212.73/3,408.90
  6. Step 6: Final answer
    x = 1,415.48

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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.