Home / 1,939.20-2,905.70-1,887.95

Finding the Fourth Proportional to 1,939.20, 2,905.70 and 1,887.95

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Solution

The fourth proportional to 1,939.20, 2,905.70 and 1,887.95 is: 2,828.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.20 : 2,905.70 = 1,887.95 : x
  2. Step 2: Convert to fraction form
    1,939.20/2,905.70 = 1,887.95/x
  3. Step 3: Cross multiply
    1,939.20x = 2,905.70 × 1,887.95
  4. Step 4: Simplify right side
    1,939.20x = 5,485,792.35
  5. Step 5: Solve for x
    x = 5,485,792.35/1,939.20
  6. Step 6: Final answer
    x = 2,828.89

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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.