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Finding the Fourth Proportional to 1,942.42, 2,911.07 and 787.54

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Solution

The fourth proportional to 1,942.42, 2,911.07 and 787.54 is: 1,180.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,942.42 : 2,911.07 = 787.54 : x
  2. Step 2: Convert to fraction form
    1,942.42/2,911.07 = 787.54/x
  3. Step 3: Cross multiply
    1,942.42x = 2,911.07 × 787.54
  4. Step 4: Simplify right side
    1,942.42x = 2,292,584.07
  5. Step 5: Solve for x
    x = 2,292,584.07/1,942.42
  6. Step 6: Final answer
    x = 1,180.27

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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.