Home / 2,137.37-3,206.39-905.11

Finding the Fourth Proportional to 2,137.37, 3,206.39 and 905.11

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Solution

The fourth proportional to 2,137.37, 3,206.39 and 905.11 is: 1,357.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,137.37 : 3,206.39 = 905.11 : x
  2. Step 2: Convert to fraction form
    2,137.37/3,206.39 = 905.11/x
  3. Step 3: Cross multiply
    2,137.37x = 3,206.39 × 905.11
  4. Step 4: Simplify right side
    2,137.37x = 2,902,123.11
  5. Step 5: Solve for x
    x = 2,902,123.11/2,137.37
  6. Step 6: Final answer
    x = 1,357.80

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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.