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Finding the Fourth Proportional to 1,857.40, 2,786.06 and 608.18

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Solution

The fourth proportional to 1,857.40, 2,786.06 and 608.18 is: 912.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,857.40 : 2,786.06 = 608.18 : x
  2. Step 2: Convert to fraction form
    1,857.40/2,786.06 = 608.18/x
  3. Step 3: Cross multiply
    1,857.40x = 2,786.06 × 608.18
  4. Step 4: Simplify right side
    1,857.40x = 1,694,413.56
  5. Step 5: Solve for x
    x = 1,694,413.56/1,857.40
  6. Step 6: Final answer
    x = 912.25

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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.