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Finding the Fourth Proportional to 491,842.20, 678,733.02 and 300,841.56

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Solution

The fourth proportional to 491,842.20, 678,733.02 and 300,841.56 is: 415,155.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,842.20 : 678,733.02 = 300,841.56 : x
  2. Step 2: Convert to fraction form
    491,842.20/678,733.02 = 300,841.56/x
  3. Step 3: Cross multiply
    491,842.20x = 678,733.02 × 300,841.56
  4. Step 4: Simplify right side
    491,842.20x = 204,191,100,560.31
  5. Step 5: Solve for x
    x = 204,191,100,560.31/491,842.20
  6. Step 6: Final answer
    x = 415,155.72

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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.