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Finding the Fourth Proportional to 391,093.97, 539,717.34 and 255,214.85

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Solution

The fourth proportional to 391,093.97, 539,717.34 and 255,214.85 is: 352,201.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,093.97 : 539,717.34 = 255,214.85 : x
  2. Step 2: Convert to fraction form
    391,093.97/539,717.34 = 255,214.85/x
  3. Step 3: Cross multiply
    391,093.97x = 539,717.34 × 255,214.85
  4. Step 4: Simplify right side
    391,093.97x = 137,743,879,970.50
  5. Step 5: Solve for x
    x = 137,743,879,970.50/391,093.97
  6. Step 6: Final answer
    x = 352,201.49

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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.