Home / 1,905.12-2,629.40-1,108.36

Finding the Fourth Proportional to 1,905.12, 2,629.40 and 1,108.36

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Solution

The fourth proportional to 1,905.12, 2,629.40 and 1,108.36 is: 1,529.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.12 : 2,629.40 = 1,108.36 : x
  2. Step 2: Convert to fraction form
    1,905.12/2,629.40 = 1,108.36/x
  3. Step 3: Cross multiply
    1,905.12x = 2,629.40 × 1,108.36
  4. Step 4: Simplify right side
    1,905.12x = 2,914,321.78
  5. Step 5: Solve for x
    x = 2,914,321.78/1,905.12
  6. Step 6: Final answer
    x = 1,529.73

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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.