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Finding the Fourth Proportional to 2,623.91, 3,936.29 and 775.21

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Solution

The fourth proportional to 2,623.91, 3,936.29 and 775.21 is: 1,162.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,623.91 : 3,936.29 = 775.21 : x
  2. Step 2: Convert to fraction form
    2,623.91/3,936.29 = 775.21/x
  3. Step 3: Cross multiply
    2,623.91x = 3,936.29 × 775.21
  4. Step 4: Simplify right side
    2,623.91x = 3,051,451.37
  5. Step 5: Solve for x
    x = 3,051,451.37/2,623.91
  6. Step 6: Final answer
    x = 1,162.94

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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.