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Finding the Fourth Proportional to 1,608.78, 2,413.49 and 787.07

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Solution

The fourth proportional to 1,608.78, 2,413.49 and 787.07 is: 1,180.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,608.78 : 2,413.49 = 787.07 : x
  2. Step 2: Convert to fraction form
    1,608.78/2,413.49 = 787.07/x
  3. Step 3: Cross multiply
    1,608.78x = 2,413.49 × 787.07
  4. Step 4: Simplify right side
    1,608.78x = 1,899,585.57
  5. Step 5: Solve for x
    x = 1,899,585.57/1,608.78
  6. Step 6: Final answer
    x = 1,180.76

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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.