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Finding the Fourth Proportional to 391,179.58, 539,829.60 and 221,446.54

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Solution

The fourth proportional to 391,179.58, 539,829.60 and 221,446.54 is: 305,597.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,179.58 : 539,829.60 = 221,446.54 : x
  2. Step 2: Convert to fraction form
    391,179.58/539,829.60 = 221,446.54/x
  3. Step 3: Cross multiply
    391,179.58x = 539,829.60 × 221,446.54
  4. Step 4: Simplify right side
    391,179.58x = 119,543,397,109.58
  5. Step 5: Solve for x
    x = 119,543,397,109.58/391,179.58
  6. Step 6: Final answer
    x = 305,597.23

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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.