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Finding the Fourth Proportional to 426,447.44, 639,798.96 and 126,938.48

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Solution

The fourth proportional to 426,447.44, 639,798.96 and 126,938.48 is: 190,445.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,447.44 : 639,798.96 = 126,938.48 : x
  2. Step 2: Convert to fraction form
    426,447.44/639,798.96 = 126,938.48/x
  3. Step 3: Cross multiply
    426,447.44x = 639,798.96 × 126,938.48
  4. Step 4: Simplify right side
    426,447.44x = 81,215,107,487.98
  5. Step 5: Solve for x
    x = 81,215,107,487.98/426,447.44
  6. Step 6: Final answer
    x = 190,445.76

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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.