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Finding the Fourth Proportional to 1,836.32, 2,753.60 and 910.80

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Solution

The fourth proportional to 1,836.32, 2,753.60 and 910.80 is: 1,365.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,836.32 : 2,753.60 = 910.80 : x
  2. Step 2: Convert to fraction form
    1,836.32/2,753.60 = 910.80/x
  3. Step 3: Cross multiply
    1,836.32x = 2,753.60 × 910.80
  4. Step 4: Simplify right side
    1,836.32x = 2,507,978.88
  5. Step 5: Solve for x
    x = 2,507,978.88/1,836.32
  6. Step 6: Final answer
    x = 1,365.76

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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.