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Finding the Fourth Proportional to 395,367.89, 545,617.01 and 225,617.81

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Solution

The fourth proportional to 395,367.89, 545,617.01 and 225,617.81 is: 311,357.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,367.89 : 545,617.01 = 225,617.81 : x
  2. Step 2: Convert to fraction form
    395,367.89/545,617.01 = 225,617.81/x
  3. Step 3: Cross multiply
    395,367.89x = 545,617.01 × 225,617.81
  4. Step 4: Simplify right side
    395,367.89x = 123,100,912,730.91
  5. Step 5: Solve for x
    x = 123,100,912,730.91/395,367.89
  6. Step 6: Final answer
    x = 311,357.90

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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.