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Finding the Fourth Proportional to 3,390.70, 5,086.10 and 1,197.89

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Solution

The fourth proportional to 3,390.70, 5,086.10 and 1,197.89 is: 1,796.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.70 : 5,086.10 = 1,197.89 : x
  2. Step 2: Convert to fraction form
    3,390.70/5,086.10 = 1,197.89/x
  3. Step 3: Cross multiply
    3,390.70x = 5,086.10 × 1,197.89
  4. Step 4: Simplify right side
    3,390.70x = 6,092,588.33
  5. Step 5: Solve for x
    x = 6,092,588.33/3,390.70
  6. Step 6: Final answer
    x = 1,796.85

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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.