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Finding the Fourth Proportional to 395,486.39, 545,780.55 and 225,736.31

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Solution

The fourth proportional to 395,486.39, 545,780.55 and 225,736.31 is: 311,521.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,486.39 : 545,780.55 = 225,736.31 : x
  2. Step 2: Convert to fraction form
    395,486.39/545,780.55 = 225,736.31/x
  3. Step 3: Cross multiply
    395,486.39x = 545,780.55 × 225,736.31
  4. Step 4: Simplify right side
    395,486.39x = 123,202,484,697.87
  5. Step 5: Solve for x
    x = 123,202,484,697.87/395,486.39
  6. Step 6: Final answer
    x = 311,521.43

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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.