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Finding the Fourth Proportional to 395,320.77, 545,400.95 and 225,456.48

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Solution

The fourth proportional to 395,320.77, 545,400.95 and 225,456.48 is: 311,049.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,320.77 : 545,400.95 = 225,456.48 : x
  2. Step 2: Convert to fraction form
    395,320.77/545,400.95 = 225,456.48/x
  3. Step 3: Cross multiply
    395,320.77x = 545,400.95 × 225,456.48
  4. Step 4: Simplify right side
    395,320.77x = 122,964,177,248.37
  5. Step 5: Solve for x
    x = 122,964,177,248.37/395,320.77
  6. Step 6: Final answer
    x = 311,049.12

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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.