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Finding the Fourth Proportional to 396,981,630.30, 556,348,238.70 and 396,981,630.30

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Solution

The fourth proportional to 396,981,630.30, 556,348,238.70 and 396,981,630.30 is: 556,348,238.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,981,630.30 : 556,348,238.70 = 396,981,630.30 : x
  2. Step 2: Convert to fraction form
    396,981,630.30/556,348,238.70 = 396,981,630.30/x
  3. Step 3: Cross multiply
    396,981,630.30x = 556,348,238.70 × 396,981,630.30
  4. Step 4: Simplify right side
    396,981,630.30x = 220,860,030,813,659,584
  5. Step 5: Solve for x
    x = 220,860,030,813,659,584/396,981,630.30
  6. Step 6: Final answer
    x = 556,348,238.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.