Home / 391,659,789.39-540,493,358.66-213,045,219.90

Finding the Fourth Proportional to 391,659,789.39, 540,493,358.66 and 213,045,219.90

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Solution

The fourth proportional to 391,659,789.39, 540,493,358.66 and 213,045,219.90 is: 294,003,953.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,659,789.39 : 540,493,358.66 = 213,045,219.90 : x
  2. Step 2: Convert to fraction form
    391,659,789.39/540,493,358.66 = 213,045,219.90/x
  3. Step 3: Cross multiply
    391,659,789.39x = 540,493,358.66 × 213,045,219.90
  4. Step 4: Simplify right side
    391,659,789.39x = 115,149,526,451,142,400
  5. Step 5: Solve for x
    x = 115,149,526,451,142,400/391,659,789.39
  6. Step 6: Final answer
    x = 294,003,953.35

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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.