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Finding the Fourth Proportional to 3,131.88, 4,321.94 and 1,734.63

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Solution

The fourth proportional to 3,131.88, 4,321.94 and 1,734.63 is: 2,393.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.88 : 4,321.94 = 1,734.63 : x
  2. Step 2: Convert to fraction form
    3,131.88/4,321.94 = 1,734.63/x
  3. Step 3: Cross multiply
    3,131.88x = 4,321.94 × 1,734.63
  4. Step 4: Simplify right side
    3,131.88x = 7,496,958.11
  5. Step 5: Solve for x
    x = 7,496,958.11/3,131.88
  6. Step 6: Final answer
    x = 2,393.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.