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Finding the Fourth Proportional to 1,609.50, 2,413.62 and 685.48

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Solution

The fourth proportional to 1,609.50, 2,413.62 and 685.48 is: 1,027.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,609.50 : 2,413.62 = 685.48 : x
  2. Step 2: Convert to fraction form
    1,609.50/2,413.62 = 685.48/x
  3. Step 3: Cross multiply
    1,609.50x = 2,413.62 × 685.48
  4. Step 4: Simplify right side
    1,609.50x = 1,654,488.24
  5. Step 5: Solve for x
    x = 1,654,488.24/1,609.50
  6. Step 6: Final answer
    x = 1,027.95

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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.