Home / 4,255.40-6,397.60-3,909.64

Finding the Fourth Proportional to 4,255.40, 6,397.60 and 3,909.64

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Solution

The fourth proportional to 4,255.40, 6,397.60 and 3,909.64 is: 5,877.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,255.40 : 6,397.60 = 3,909.64 : x
  2. Step 2: Convert to fraction form
    4,255.40/6,397.60 = 3,909.64/x
  3. Step 3: Cross multiply
    4,255.40x = 6,397.60 × 3,909.64
  4. Step 4: Simplify right side
    4,255.40x = 25,012,312.86
  5. Step 5: Solve for x
    x = 25,012,312.86/4,255.40
  6. Step 6: Final answer
    x = 5,877.78

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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.