Home / 1,604.25-2,213.87-905.76

Finding the Fourth Proportional to 1,604.25, 2,213.87 and 905.76

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Solution

The fourth proportional to 1,604.25, 2,213.87 and 905.76 is: 1,249.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,604.25 : 2,213.87 = 905.76 : x
  2. Step 2: Convert to fraction form
    1,604.25/2,213.87 = 905.76/x
  3. Step 3: Cross multiply
    1,604.25x = 2,213.87 × 905.76
  4. Step 4: Simplify right side
    1,604.25x = 2,005,230.36
  5. Step 5: Solve for x
    x = 2,005,230.36/1,604.25
  6. Step 6: Final answer
    x = 1,249.95

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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.