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Finding the Fourth Proportional to 1,840.50, 2,760.92 and 685.98

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Solution

The fourth proportional to 1,840.50, 2,760.92 and 685.98 is: 1,029.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,840.50 : 2,760.92 = 685.98 : x
  2. Step 2: Convert to fraction form
    1,840.50/2,760.92 = 685.98/x
  3. Step 3: Cross multiply
    1,840.50x = 2,760.92 × 685.98
  4. Step 4: Simplify right side
    1,840.50x = 1,893,935.90
  5. Step 5: Solve for x
    x = 1,893,935.90/1,840.50
  6. Step 6: Final answer
    x = 1,029.03

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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.