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Finding the Fourth Proportional to 1,206,451,978.20, 1,809,677,967.30 and 854,425,459.80

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Solution

The fourth proportional to 1,206,451,978.20, 1,809,677,967.30 and 854,425,459.80 is: 1,281,638,189.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206,451,978.20 : 1,809,677,967.30 = 854,425,459.80 : x
  2. Step 2: Convert to fraction form
    1,206,451,978.20/1,809,677,967.30 = 854,425,459.80/x
  3. Step 3: Cross multiply
    1,206,451,978.20x = 1,809,677,967.30 × 854,425,459.80
  4. Step 4: Simplify right side
    1,206,451,978.20x = 1,546,234,929,300,231,680
  5. Step 5: Solve for x
    x = 1,546,234,929,300,231,680/1,206,451,978.20
  6. Step 6: Final answer
    x = 1,281,638,189.70

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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.