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Finding the Fourth Proportional to 1,609.27, 2,413.90 and 787.32

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Solution

The fourth proportional to 1,609.27, 2,413.90 and 787.32 is: 1,180.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,609.27 : 2,413.90 = 787.32 : x
  2. Step 2: Convert to fraction form
    1,609.27/2,413.90 = 787.32/x
  3. Step 3: Cross multiply
    1,609.27x = 2,413.90 × 787.32
  4. Step 4: Simplify right side
    1,609.27x = 1,900,512.73
  5. Step 5: Solve for x
    x = 1,900,512.73/1,609.27
  6. Step 6: Final answer
    x = 1,180.98

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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.