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Finding the Fourth Proportional to 2,153, 3,229.50 and 692.12

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Solution

The fourth proportional to 2,153, 3,229.50 and 692.12 is: 1,038.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153 : 3,229.50 = 692.12 : x
  2. Step 2: Convert to fraction form
    2,153/3,229.50 = 692.12/x
  3. Step 3: Cross multiply
    2,153x = 3,229.50 × 692.12
  4. Step 4: Simplify right side
    2,153x = 2,235,201.54
  5. Step 5: Solve for x
    x = 2,235,201.54/2,153
  6. Step 6: Final answer
    x = 1,038.18

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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.