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Finding the Fourth Proportional to 398,874.46, 550,649.91 and 308,026.48

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Solution

The fourth proportional to 398,874.46, 550,649.91 and 308,026.48 is: 425,233.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,874.46 : 550,649.91 = 308,026.48 : x
  2. Step 2: Convert to fraction form
    398,874.46/550,649.91 = 308,026.48/x
  3. Step 3: Cross multiply
    398,874.46x = 550,649.91 × 308,026.48
  4. Step 4: Simplify right side
    398,874.46x = 169,614,753,489.62
  5. Step 5: Solve for x
    x = 169,614,753,489.62/398,874.46
  6. Step 6: Final answer
    x = 425,233.43

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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.