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Finding the Fourth Proportional to 2,153.42, 3,230.61 and 692.56

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Solution

The fourth proportional to 2,153.42, 3,230.61 and 692.56 is: 1,038.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.42 : 3,230.61 = 692.56 : x
  2. Step 2: Convert to fraction form
    2,153.42/3,230.61 = 692.56/x
  3. Step 3: Cross multiply
    2,153.42x = 3,230.61 × 692.56
  4. Step 4: Simplify right side
    2,153.42x = 2,237,391.26
  5. Step 5: Solve for x
    x = 2,237,391.26/2,153.42
  6. Step 6: Final answer
    x = 1,038.99

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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.