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Finding the Fourth Proportional to 5,489.64, 8,232.39 and 1,978.71

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Solution

The fourth proportional to 5,489.64, 8,232.39 and 1,978.71 is: 2,967.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,489.64 : 8,232.39 = 1,978.71 : x
  2. Step 2: Convert to fraction form
    5,489.64/8,232.39 = 1,978.71/x
  3. Step 3: Cross multiply
    5,489.64x = 8,232.39 × 1,978.71
  4. Step 4: Simplify right side
    5,489.64x = 16,289,512.42
  5. Step 5: Solve for x
    x = 16,289,512.42/5,489.64
  6. Step 6: Final answer
    x = 2,967.32

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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.