Home / 2,785.20-4,177.80-936.78

Finding the Fourth Proportional to 2,785.20, 4,177.80 and 936.78

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Solution

The fourth proportional to 2,785.20, 4,177.80 and 936.78 is: 1,405.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.20 : 4,177.80 = 936.78 : x
  2. Step 2: Convert to fraction form
    2,785.20/4,177.80 = 936.78/x
  3. Step 3: Cross multiply
    2,785.20x = 4,177.80 × 936.78
  4. Step 4: Simplify right side
    2,785.20x = 3,913,679.48
  5. Step 5: Solve for x
    x = 3,913,679.48/2,785.20
  6. Step 6: Final answer
    x = 1,405.17

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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.