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Finding the Fourth Proportional to 391,069.64, 539,676.09 and 212,221.64

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Solution

The fourth proportional to 391,069.64, 539,676.09 and 212,221.64 is: 292,865.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,069.64 : 539,676.09 = 212,221.64 : x
  2. Step 2: Convert to fraction form
    391,069.64/539,676.09 = 212,221.64/x
  3. Step 3: Cross multiply
    391,069.64x = 539,676.09 × 212,221.64
  4. Step 4: Simplify right side
    391,069.64x = 114,530,944,888.59
  5. Step 5: Solve for x
    x = 114,530,944,888.59/391,069.64
  6. Step 6: Final answer
    x = 292,865.86

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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.