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Finding the Fourth Proportional to 398,748.86, 550,137.39 and 226,649.42

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Solution

The fourth proportional to 398,748.86, 550,137.39 and 226,649.42 is: 312,698.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,748.86 : 550,137.39 = 226,649.42 : x
  2. Step 2: Convert to fraction form
    398,748.86/550,137.39 = 226,649.42/x
  3. Step 3: Cross multiply
    398,748.86x = 550,137.39 × 226,649.42
  4. Step 4: Simplify right side
    398,748.86x = 124,688,320,363.81
  5. Step 5: Solve for x
    x = 124,688,320,363.81/398,748.86
  6. Step 6: Final answer
    x = 312,698.88

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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.