Home / 1,929.78-2,887.92-1,383.12

Finding the Fourth Proportional to 1,929.78, 2,887.92 and 1,383.12

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Solution

The fourth proportional to 1,929.78, 2,887.92 and 1,383.12 is: 2,069.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.78 : 2,887.92 = 1,383.12 : x
  2. Step 2: Convert to fraction form
    1,929.78/2,887.92 = 1,383.12/x
  3. Step 3: Cross multiply
    1,929.78x = 2,887.92 × 1,383.12
  4. Step 4: Simplify right side
    1,929.78x = 3,994,339.91
  5. Step 5: Solve for x
    x = 3,994,339.91/1,929.78
  6. Step 6: Final answer
    x = 2,069.84

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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.