Home / 391,222.56-539,887.44-221,511.36

Finding the Fourth Proportional to 391,222.56, 539,887.44 and 221,511.36

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Solution

The fourth proportional to 391,222.56, 539,887.44 and 221,511.36 is: 305,685.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,222.56 : 539,887.44 = 221,511.36 : x
  2. Step 2: Convert to fraction form
    391,222.56/539,887.44 = 221,511.36/x
  3. Step 3: Cross multiply
    391,222.56x = 539,887.44 × 221,511.36
  4. Step 4: Simplify right side
    391,222.56x = 119,591,201,081.32
  5. Step 5: Solve for x
    x = 119,591,201,081.32/391,222.56
  6. Step 6: Final answer
    x = 305,685.85

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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.