Home / 1,219,679.92-1,829,765.24-420,992.40

Finding the Fourth Proportional to 1,219,679.92, 1,829,765.24 and 420,992.40

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Solution

The fourth proportional to 1,219,679.92, 1,829,765.24 and 420,992.40 is: 631,573.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219,679.92 : 1,829,765.24 = 420,992.40 : x
  2. Step 2: Convert to fraction form
    1,219,679.92/1,829,765.24 = 420,992.40/x
  3. Step 3: Cross multiply
    1,219,679.92x = 1,829,765.24 × 420,992.40
  4. Step 4: Simplify right side
    1,219,679.92x = 770,317,259,824.18
  5. Step 5: Solve for x
    x = 770,317,259,824.18/1,219,679.92
  6. Step 6: Final answer
    x = 631,573.29

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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.