Home / 1,185.45-1,769.40-1,112.49

Finding the Fourth Proportional to 1,185.45, 1,769.40 and 1,112.49

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Solution

The fourth proportional to 1,185.45, 1,769.40 and 1,112.49 is: 1,660.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,185.45 : 1,769.40 = 1,112.49 : x
  2. Step 2: Convert to fraction form
    1,185.45/1,769.40 = 1,112.49/x
  3. Step 3: Cross multiply
    1,185.45x = 1,769.40 × 1,112.49
  4. Step 4: Simplify right side
    1,185.45x = 1,968,439.81
  5. Step 5: Solve for x
    x = 1,968,439.81/1,185.45
  6. Step 6: Final answer
    x = 1,660.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.