Home / 428,105.76-591,183.06-320,488.98

Finding the Fourth Proportional to 428,105.76, 591,183.06 and 320,488.98

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Solution

The fourth proportional to 428,105.76, 591,183.06 and 320,488.98 is: 442,572.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,105.76 : 591,183.06 = 320,488.98 : x
  2. Step 2: Convert to fraction form
    428,105.76/591,183.06 = 320,488.98/x
  3. Step 3: Cross multiply
    428,105.76x = 591,183.06 × 320,488.98
  4. Step 4: Simplify right side
    428,105.76x = 189,467,655,892.68
  5. Step 5: Solve for x
    x = 189,467,655,892.68/428,105.76
  6. Step 6: Final answer
    x = 442,572.08

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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.