Home / 2,785.76-4,178.37-936.89

Finding the Fourth Proportional to 2,785.76, 4,178.37 and 936.89

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Solution

The fourth proportional to 2,785.76, 4,178.37 and 936.89 is: 1,405.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.76 : 4,178.37 = 936.89 : x
  2. Step 2: Convert to fraction form
    2,785.76/4,178.37 = 936.89/x
  3. Step 3: Cross multiply
    2,785.76x = 4,178.37 × 936.89
  4. Step 4: Simplify right side
    2,785.76x = 3,914,652.73
  5. Step 5: Solve for x
    x = 3,914,652.73/2,785.76
  6. Step 6: Final answer
    x = 1,405.24

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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.