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Finding the Fourth Proportional to 428,676.59, 642,883.57 and 296,406.83

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Solution

The fourth proportional to 428,676.59, 642,883.57 and 296,406.83 is: 444,519.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,676.59 : 642,883.57 = 296,406.83 : x
  2. Step 2: Convert to fraction form
    428,676.59/642,883.57 = 296,406.83/x
  3. Step 3: Cross multiply
    428,676.59x = 642,883.57 × 296,406.83
  4. Step 4: Simplify right side
    428,676.59x = 190,555,081,908.98
  5. Step 5: Solve for x
    x = 190,555,081,908.98/428,676.59
  6. Step 6: Final answer
    x = 444,519.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.