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Finding the Fourth Proportional to 391,093.10, 539,716.14 and 255,213.98

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Solution

The fourth proportional to 391,093.10, 539,716.14 and 255,213.98 is: 352,200.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,093.10 : 539,716.14 = 255,213.98 : x
  2. Step 2: Convert to fraction form
    391,093.10/539,716.14 = 255,213.98/x
  3. Step 3: Cross multiply
    391,093.10x = 539,716.14 × 255,213.98
  4. Step 4: Simplify right side
    391,093.10x = 137,743,104,159.64
  5. Step 5: Solve for x
    x = 137,743,104,159.64/391,093.10
  6. Step 6: Final answer
    x = 352,200.29

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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.