Home / 2,628.37-3,939.08-1,239.79

Finding the Fourth Proportional to 2,628.37, 3,939.08 and 1,239.79

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Solution

The fourth proportional to 2,628.37, 3,939.08 and 1,239.79 is: 1,858.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.37 : 3,939.08 = 1,239.79 : x
  2. Step 2: Convert to fraction form
    2,628.37/3,939.08 = 1,239.79/x
  3. Step 3: Cross multiply
    2,628.37x = 3,939.08 × 1,239.79
  4. Step 4: Simplify right side
    2,628.37x = 4,883,631.99
  5. Step 5: Solve for x
    x = 4,883,631.99/2,628.37
  6. Step 6: Final answer
    x = 1,858.05

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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.