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Finding the Fourth Proportional to 395,376.87, 545,659.16 and 225,636.51

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Solution

The fourth proportional to 395,376.87, 545,659.16 and 225,636.51 is: 311,400.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,376.87 : 545,659.16 = 225,636.51 : x
  2. Step 2: Convert to fraction form
    395,376.87/545,659.16 = 225,636.51/x
  3. Step 3: Cross multiply
    395,376.87x = 545,659.16 × 225,636.51
  4. Step 4: Simplify right side
    395,376.87x = 123,120,628,511.93
  5. Step 5: Solve for x
    x = 123,120,628,511.93/395,376.87
  6. Step 6: Final answer
    x = 311,400.69

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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.