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Finding the Fourth Proportional to 5,188.43, 7,781.60 and 1,489.67

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Solution

The fourth proportional to 5,188.43, 7,781.60 and 1,489.67 is: 2,234.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,188.43 : 7,781.60 = 1,489.67 : x
  2. Step 2: Convert to fraction form
    5,188.43/7,781.60 = 1,489.67/x
  3. Step 3: Cross multiply
    5,188.43x = 7,781.60 × 1,489.67
  4. Step 4: Simplify right side
    5,188.43x = 11,591,969.72
  5. Step 5: Solve for x
    x = 11,591,969.72/5,188.43
  6. Step 6: Final answer
    x = 2,234.20

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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.