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Finding the Fourth Proportional to 426,362.58, 639,485.55 and 126,889.38

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Solution

The fourth proportional to 426,362.58, 639,485.55 and 126,889.38 is: 190,316.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,362.58 : 639,485.55 = 126,889.38 : x
  2. Step 2: Convert to fraction form
    426,362.58/639,485.55 = 126,889.38/x
  3. Step 3: Cross multiply
    426,362.58x = 639,485.55 × 126,889.38
  4. Step 4: Simplify right side
    426,362.58x = 81,143,924,958.46
  5. Step 5: Solve for x
    x = 81,143,924,958.46/426,362.58
  6. Step 6: Final answer
    x = 190,316.71

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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.