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Finding the Fourth Proportional to 395,399.52, 545,646.24 and 225,636.48

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Solution

The fourth proportional to 395,399.52, 545,646.24 and 225,636.48 is: 311,375.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,399.52 : 545,646.24 = 225,636.48 : x
  2. Step 2: Convert to fraction form
    395,399.52/545,646.24 = 225,636.48/x
  3. Step 3: Cross multiply
    395,399.52x = 545,646.24 × 225,636.48
  4. Step 4: Simplify right side
    395,399.52x = 123,117,696,918.84
  5. Step 5: Solve for x
    x = 123,117,696,918.84/395,399.52
  6. Step 6: Final answer
    x = 311,375.43

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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.