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Finding the Fourth Proportional to 426,936.21, 639,656.63 and 380,600.97

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Solution

The fourth proportional to 426,936.21, 639,656.63 and 380,600.97 is: 570,234.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,936.21 : 639,656.63 = 380,600.97 : x
  2. Step 2: Convert to fraction form
    426,936.21/639,656.63 = 380,600.97/x
  3. Step 3: Cross multiply
    426,936.21x = 639,656.63 × 380,600.97
  4. Step 4: Simplify right side
    426,936.21x = 243,453,933,844.93
  5. Step 5: Solve for x
    x = 243,453,933,844.93/426,936.21
  6. Step 6: Final answer
    x = 570,234.92

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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.