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Finding the Fourth Proportional to 3,593.79, 5,390.68 and 1,128.60

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Solution

The fourth proportional to 3,593.79, 5,390.68 and 1,128.60 is: 1,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,593.79 : 5,390.68 = 1,128.60 : x
  2. Step 2: Convert to fraction form
    3,593.79/5,390.68 = 1,128.60/x
  3. Step 3: Cross multiply
    3,593.79x = 5,390.68 × 1,128.60
  4. Step 4: Simplify right side
    3,593.79x = 6,083,921.45
  5. Step 5: Solve for x
    x = 6,083,921.45/3,593.79
  6. Step 6: Final answer
    x = 1,692.90

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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.