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Finding the Fourth Proportional to 1,961.92, 2,707.93 and 1,123.11

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Solution

The fourth proportional to 1,961.92, 2,707.93 and 1,123.11 is: 1,550.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.92 : 2,707.93 = 1,123.11 : x
  2. Step 2: Convert to fraction form
    1,961.92/2,707.93 = 1,123.11/x
  3. Step 3: Cross multiply
    1,961.92x = 2,707.93 × 1,123.11
  4. Step 4: Simplify right side
    1,961.92x = 3,041,304.42
  5. Step 5: Solve for x
    x = 3,041,304.42/1,961.92
  6. Step 6: Final answer
    x = 1,550.17

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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.