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Finding the Fourth Proportional to 398,754.09, 550,276.74 and 228,989.43

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Solution

The fourth proportional to 398,754.09, 550,276.74 and 228,989.43 is: 316,003.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,754.09 : 550,276.74 = 228,989.43 : x
  2. Step 2: Convert to fraction form
    398,754.09/550,276.74 = 228,989.43/x
  3. Step 3: Cross multiply
    398,754.09x = 550,276.74 × 228,989.43
  4. Step 4: Simplify right side
    398,754.09x = 126,007,557,034.86
  5. Step 5: Solve for x
    x = 126,007,557,034.86/398,754.09
  6. Step 6: Final answer
    x = 316,003.17

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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.