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Finding the Fourth Proportional to 1,951.13, 2,692.37 and 1,111.88

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Solution

The fourth proportional to 1,951.13, 2,692.37 and 1,111.88 is: 1,534.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,951.13 : 2,692.37 = 1,111.88 : x
  2. Step 2: Convert to fraction form
    1,951.13/2,692.37 = 1,111.88/x
  3. Step 3: Cross multiply
    1,951.13x = 2,692.37 × 1,111.88
  4. Step 4: Simplify right side
    1,951.13x = 2,993,592.36
  5. Step 5: Solve for x
    x = 2,993,592.36/1,951.13
  6. Step 6: Final answer
    x = 1,534.29

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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.