Home / 5,489.70-8,234.55-1,385.70

Finding the Fourth Proportional to 5,489.70, 8,234.55 and 1,385.70

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Solution

The fourth proportional to 5,489.70, 8,234.55 and 1,385.70 is: 2,078.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,489.70 : 8,234.55 = 1,385.70 : x
  2. Step 2: Convert to fraction form
    5,489.70/8,234.55 = 1,385.70/x
  3. Step 3: Cross multiply
    5,489.70x = 8,234.55 × 1,385.70
  4. Step 4: Simplify right side
    5,489.70x = 11,410,615.94
  5. Step 5: Solve for x
    x = 11,410,615.94/5,489.70
  6. Step 6: Final answer
    x = 2,078.55

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Similar ratio
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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.