Home / 2,660.40-3,990.36-928.92

Finding the Fourth Proportional to 2,660.40, 3,990.36 and 928.92

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Solution

The fourth proportional to 2,660.40, 3,990.36 and 928.92 is: 1,393.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.40 : 3,990.36 = 928.92 : x
  2. Step 2: Convert to fraction form
    2,660.40/3,990.36 = 928.92/x
  3. Step 3: Cross multiply
    2,660.40x = 3,990.36 × 928.92
  4. Step 4: Simplify right side
    2,660.40x = 3,706,725.21
  5. Step 5: Solve for x
    x = 3,706,725.21/2,660.40
  6. Step 6: Final answer
    x = 1,393.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.