Home / 1,942.08-2,913.30-787.92

Finding the Fourth Proportional to 1,942.08, 2,913.30 and 787.92

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Solution

The fourth proportional to 1,942.08, 2,913.30 and 787.92 is: 1,181.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,942.08 : 2,913.30 = 787.92 : x
  2. Step 2: Convert to fraction form
    1,942.08/2,913.30 = 787.92/x
  3. Step 3: Cross multiply
    1,942.08x = 2,913.30 × 787.92
  4. Step 4: Simplify right side
    1,942.08x = 2,295,447.34
  5. Step 5: Solve for x
    x = 2,295,447.34/1,942.08
  6. Step 6: Final answer
    x = 1,181.95

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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.