Home / 5,419,679.92-7,478,619.30-3,128,578.72

Finding the Fourth Proportional to 5,419,679.92, 7,478,619.30 and 3,128,578.72

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Solution

The fourth proportional to 5,419,679.92, 7,478,619.30 and 3,128,578.72 is: 4,317,127.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,419,679.92 : 7,478,619.30 = 3,128,578.72 : x
  2. Step 2: Convert to fraction form
    5,419,679.92/7,478,619.30 = 3,128,578.72/x
  3. Step 3: Cross multiply
    5,419,679.92x = 7,478,619.30 × 3,128,578.72
  4. Step 4: Simplify right side
    5,419,679.92x = 23,397,449,196,961.30
  5. Step 5: Solve for x
    x = 23,397,449,196,961.30/5,419,679.92
  6. Step 6: Final answer
    x = 4,317,127.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.