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Finding the Fourth Proportional to 395,939.20, 593,980.80 and 129,625.60

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Solution

The fourth proportional to 395,939.20, 593,980.80 and 129,625.60 is: 194,461.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,939.20 : 593,980.80 = 129,625.60 : x
  2. Step 2: Convert to fraction form
    395,939.20/593,980.80 = 129,625.60/x
  3. Step 3: Cross multiply
    395,939.20x = 593,980.80 × 129,625.60
  4. Step 4: Simplify right side
    395,939.20x = 76,995,117,588.48
  5. Step 5: Solve for x
    x = 76,995,117,588.48/395,939.20
  6. Step 6: Final answer
    x = 194,461.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.