Home / 1,660.80-2,289.60-1,381.44

Finding the Fourth Proportional to 1,660.80, 2,289.60 and 1,381.44

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Solution

The fourth proportional to 1,660.80, 2,289.60 and 1,381.44 is: 1,904.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.80 : 2,289.60 = 1,381.44 : x
  2. Step 2: Convert to fraction form
    1,660.80/2,289.60 = 1,381.44/x
  3. Step 3: Cross multiply
    1,660.80x = 2,289.60 × 1,381.44
  4. Step 4: Simplify right side
    1,660.80x = 3,162,945.02
  5. Step 5: Solve for x
    x = 3,162,945.02/1,660.80
  6. Step 6: Final answer
    x = 1,904.47

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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.