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Finding the Fourth Proportional to 3,593.40, 5,390.64 and 1,128.44

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Solution

The fourth proportional to 3,593.40, 5,390.64 and 1,128.44 is: 1,692.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,593.40 : 5,390.64 = 1,128.44 : x
  2. Step 2: Convert to fraction form
    3,593.40/5,390.64 = 1,128.44/x
  3. Step 3: Cross multiply
    3,593.40x = 5,390.64 × 1,128.44
  4. Step 4: Simplify right side
    3,593.40x = 6,083,013.80
  5. Step 5: Solve for x
    x = 6,083,013.80/3,593.40
  6. Step 6: Final answer
    x = 1,692.83

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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.