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Finding the Fourth Proportional to 1,908.54, 2,633.90 and 1,123.11

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Solution

The fourth proportional to 1,908.54, 2,633.90 and 1,123.11 is: 1,549.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908.54 : 2,633.90 = 1,123.11 : x
  2. Step 2: Convert to fraction form
    1,908.54/2,633.90 = 1,123.11/x
  3. Step 3: Cross multiply
    1,908.54x = 2,633.90 × 1,123.11
  4. Step 4: Simplify right side
    1,908.54x = 2,958,153.81
  5. Step 5: Solve for x
    x = 2,958,153.81/1,908.54
  6. Step 6: Final answer
    x = 1,549.96

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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.