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Finding the Fourth Proportional to 399,171.06, 550,978.17 and 246,256.83

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Solution

The fourth proportional to 399,171.06, 550,978.17 and 246,256.83 is: 339,909.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,171.06 : 550,978.17 = 246,256.83 : x
  2. Step 2: Convert to fraction form
    399,171.06/550,978.17 = 246,256.83/x
  3. Step 3: Cross multiply
    399,171.06x = 550,978.17 × 246,256.83
  4. Step 4: Simplify right side
    399,171.06x = 135,682,137,543.40
  5. Step 5: Solve for x
    x = 135,682,137,543.40/399,171.06
  6. Step 6: Final answer
    x = 339,909.76

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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.