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Finding the Fourth Proportional to 395,358.87, 545,634.36 and 225,618.51

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Solution

The fourth proportional to 395,358.87, 545,634.36 and 225,618.51 is: 311,375.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,358.87 : 545,634.36 = 225,618.51 : x
  2. Step 2: Convert to fraction form
    395,358.87/545,634.36 = 225,618.51/x
  3. Step 3: Cross multiply
    395,358.87x = 545,634.36 × 225,618.51
  4. Step 4: Simplify right side
    395,358.87x = 123,105,211,308.00
  5. Step 5: Solve for x
    x = 123,105,211,308.00/395,358.87
  6. Step 6: Final answer
    x = 311,375.87

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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.