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Finding the Fourth Proportional to 1,889.60, 2,607.12 and 1,226.84

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Solution

The fourth proportional to 1,889.60, 2,607.12 and 1,226.84 is: 1,692.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.60 : 2,607.12 = 1,226.84 : x
  2. Step 2: Convert to fraction form
    1,889.60/2,607.12 = 1,226.84/x
  3. Step 3: Cross multiply
    1,889.60x = 2,607.12 × 1,226.84
  4. Step 4: Simplify right side
    1,889.60x = 3,198,519.10
  5. Step 5: Solve for x
    x = 3,198,519.10/1,889.60
  6. Step 6: Final answer
    x = 1,692.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.