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Finding the Fourth Proportional to 396,011.40, 593,871.30 and 129,780.60

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Solution

The fourth proportional to 396,011.40, 593,871.30 and 129,780.60 is: 194,623.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,011.40 : 593,871.30 = 129,780.60 : x
  2. Step 2: Convert to fraction form
    396,011.40/593,871.30 = 129,780.60/x
  3. Step 3: Cross multiply
    396,011.40x = 593,871.30 × 129,780.60
  4. Step 4: Simplify right side
    396,011.40x = 77,072,973,636.78
  5. Step 5: Solve for x
    x = 77,072,973,636.78/396,011.40
  6. Step 6: Final answer
    x = 194,623.12

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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.