Home / 428,198.40-591,105.60-307,929.60

Finding the Fourth Proportional to 428,198.40, 591,105.60 and 307,929.60

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Solution

The fourth proportional to 428,198.40, 591,105.60 and 307,929.60 is: 425,080.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,198.40 : 591,105.60 = 307,929.60 : x
  2. Step 2: Convert to fraction form
    428,198.40/591,105.60 = 307,929.60/x
  3. Step 3: Cross multiply
    428,198.40x = 591,105.60 × 307,929.60
  4. Step 4: Simplify right side
    428,198.40x = 182,018,910,965.76
  5. Step 5: Solve for x
    x = 182,018,910,965.76/428,198.40
  6. Step 6: Final answer
    x = 425,080.78

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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.