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Finding the Fourth Proportional to 3,123.88, 4,689.48 and 2,195.64

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Solution

The fourth proportional to 3,123.88, 4,689.48 and 2,195.64 is: 3,296.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.88 : 4,689.48 = 2,195.64 : x
  2. Step 2: Convert to fraction form
    3,123.88/4,689.48 = 2,195.64/x
  3. Step 3: Cross multiply
    3,123.88x = 4,689.48 × 2,195.64
  4. Step 4: Simplify right side
    3,123.88x = 10,296,409.87
  5. Step 5: Solve for x
    x = 10,296,409.87/3,123.88
  6. Step 6: Final answer
    x = 3,296.03

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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.