Home / 1,928.54-2,660.30-1,220.17

Finding the Fourth Proportional to 1,928.54, 2,660.30 and 1,220.17

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Solution

The fourth proportional to 1,928.54, 2,660.30 and 1,220.17 is: 1,683.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.54 : 2,660.30 = 1,220.17 : x
  2. Step 2: Convert to fraction form
    1,928.54/2,660.30 = 1,220.17/x
  3. Step 3: Cross multiply
    1,928.54x = 2,660.30 × 1,220.17
  4. Step 4: Simplify right side
    1,928.54x = 3,246,018.25
  5. Step 5: Solve for x
    x = 3,246,018.25/1,928.54
  6. Step 6: Final answer
    x = 1,683.15

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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.