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Finding the Fourth Proportional to 5,692.80, 8,539.20 and 3,494.40

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Solution

The fourth proportional to 5,692.80, 8,539.20 and 3,494.40 is: 5,241.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,692.80 : 8,539.20 = 3,494.40 : x
  2. Step 2: Convert to fraction form
    5,692.80/8,539.20 = 3,494.40/x
  3. Step 3: Cross multiply
    5,692.80x = 8,539.20 × 3,494.40
  4. Step 4: Simplify right side
    5,692.80x = 29,839,380.48
  5. Step 5: Solve for x
    x = 29,839,380.48/5,692.80
  6. Step 6: Final answer
    x = 5,241.60

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1.5x scale

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.