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Finding the Fourth Proportional to 395,361.87, 545,638.50 and 225,621.51

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Solution

The fourth proportional to 395,361.87, 545,638.50 and 225,621.51 is: 311,380.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,361.87 : 545,638.50 = 225,621.51 : x
  2. Step 2: Convert to fraction form
    395,361.87/545,638.50 = 225,621.51/x
  3. Step 3: Cross multiply
    395,361.87x = 545,638.50 × 225,621.51
  4. Step 4: Simplify right side
    395,361.87x = 123,107,782,284.14
  5. Step 5: Solve for x
    x = 123,107,782,284.14/395,361.87
  6. Step 6: Final answer
    x = 311,380.01

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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.