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Finding the Fourth Proportional to 395,190.45, 545,356.80 and 220,762.94

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Solution

The fourth proportional to 395,190.45, 545,356.80 and 220,762.94 is: 304,649.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,190.45 : 545,356.80 = 220,762.94 : x
  2. Step 2: Convert to fraction form
    395,190.45/545,356.80 = 220,762.94/x
  3. Step 3: Cross multiply
    395,190.45x = 545,356.80 × 220,762.94
  4. Step 4: Simplify right side
    395,190.45x = 120,394,567,790.21
  5. Step 5: Solve for x
    x = 120,394,567,790.21/395,190.45
  6. Step 6: Final answer
    x = 304,649.49

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1.5x scale

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.