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Finding the Fourth Proportional to 310,620.94, 428,553.80 and 253,161.46

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Solution

The fourth proportional to 310,620.94, 428,553.80 and 253,161.46 is: 349,278.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,620.94 : 428,553.80 = 253,161.46 : x
  2. Step 2: Convert to fraction form
    310,620.94/428,553.80 = 253,161.46/x
  3. Step 3: Cross multiply
    310,620.94x = 428,553.80 × 253,161.46
  4. Step 4: Simplify right side
    310,620.94x = 108,493,305,696.55
  5. Step 5: Solve for x
    x = 108,493,305,696.55/310,620.94
  6. Step 6: Final answer
    x = 349,278.79

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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.