Home / 1,928.66-2,660.70-1,220.32

Finding the Fourth Proportional to 1,928.66, 2,660.70 and 1,220.32

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Solution

The fourth proportional to 1,928.66, 2,660.70 and 1,220.32 is: 1,683.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.66 : 2,660.70 = 1,220.32 : x
  2. Step 2: Convert to fraction form
    1,928.66/2,660.70 = 1,220.32/x
  3. Step 3: Cross multiply
    1,928.66x = 2,660.70 × 1,220.32
  4. Step 4: Simplify right side
    1,928.66x = 3,246,891.50
  5. Step 5: Solve for x
    x = 3,246,891.50/1,928.66
  6. Step 6: Final answer
    x = 1,683.50

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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.