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Finding the Fourth Proportional to 395,912.40, 593,863.20 and 129,681.60

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Solution

The fourth proportional to 395,912.40, 593,863.20 and 129,681.60 is: 194,520.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,912.40 : 593,863.20 = 129,681.60 : x
  2. Step 2: Convert to fraction form
    395,912.40/593,863.20 = 129,681.60/x
  3. Step 3: Cross multiply
    395,912.40x = 593,863.20 × 129,681.60
  4. Step 4: Simplify right side
    395,912.40x = 77,013,129,957.12
  5. Step 5: Solve for x
    x = 77,013,129,957.12/395,912.40
  6. Step 6: Final answer
    x = 194,520.63

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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.