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Finding the Fourth Proportional to 396,006.40, 593,863.80 and 129,775.60

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Solution

The fourth proportional to 396,006.40, 593,863.80 and 129,775.60 is: 194,615.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,006.40 : 593,863.80 = 129,775.60 : x
  2. Step 2: Convert to fraction form
    396,006.40/593,863.80 = 129,775.60/x
  3. Step 3: Cross multiply
    396,006.40x = 593,863.80 × 129,775.60
  4. Step 4: Simplify right side
    396,006.40x = 77,069,030,963.28
  5. Step 5: Solve for x
    x = 77,069,030,963.28/396,006.40
  6. Step 6: Final answer
    x = 194,615.62

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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.