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Finding the Fourth Proportional to 391,091.97, 539,714.58 and 255,212.85

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Solution

The fourth proportional to 391,091.97, 539,714.58 and 255,212.85 is: 352,198.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,091.97 : 539,714.58 = 255,212.85 : x
  2. Step 2: Convert to fraction form
    391,091.97/539,714.58 = 255,212.85/x
  3. Step 3: Cross multiply
    391,091.97x = 539,714.58 × 255,212.85
  4. Step 4: Simplify right side
    391,091.97x = 137,742,096,148.35
  5. Step 5: Solve for x
    x = 137,742,096,148.35/391,091.97
  6. Step 6: Final answer
    x = 352,198.73

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1.5x scale

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.