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Finding the Fourth Proportional to 391,093.92, 539,709.66 and 212,245.92

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Solution

The fourth proportional to 391,093.92, 539,709.66 and 212,245.92 is: 292,899.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,093.92 : 539,709.66 = 212,245.92 : x
  2. Step 2: Convert to fraction form
    391,093.92/539,709.66 = 212,245.92/x
  3. Step 3: Cross multiply
    391,093.92x = 539,709.66 × 212,245.92
  4. Step 4: Simplify right side
    391,093.92x = 114,551,173,319.59
  5. Step 5: Solve for x
    x = 114,551,173,319.59/391,093.92
  6. Step 6: Final answer
    x = 292,899.40

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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.