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Finding the Fourth Proportional to 692.80, 984.16 and 692.80

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Solution

The fourth proportional to 692.80, 984.16 and 692.80 is: 984.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.80 : 984.16 = 692.80 : x
  2. Step 2: Convert to fraction form
    692.80/984.16 = 692.80/x
  3. Step 3: Cross multiply
    692.80x = 984.16 × 692.80
  4. Step 4: Simplify right side
    692.80x = 681,826.05
  5. Step 5: Solve for x
    x = 681,826.05/692.80
  6. Step 6: Final answer
    x = 984.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.