Home / 1,444.06-1,991.81-919.85

Finding the Fourth Proportional to 1,444.06, 1,991.81 and 919.85

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Solution

The fourth proportional to 1,444.06, 1,991.81 and 919.85 is: 1,268.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,444.06 : 1,991.81 = 919.85 : x
  2. Step 2: Convert to fraction form
    1,444.06/1,991.81 = 919.85/x
  3. Step 3: Cross multiply
    1,444.06x = 1,991.81 × 919.85
  4. Step 4: Simplify right side
    1,444.06x = 1,832,161.83
  5. Step 5: Solve for x
    x = 1,832,161.83/1,444.06
  6. Step 6: Final answer
    x = 1,268.76

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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.