Home / 1,280,728,387,072.30-1,921,024,920,909.60-420,089,189,996.62

Finding the Fourth Proportional to 1,280,728,387,072.30, 1,921,024,920,909.60 and 420,089,189,996.62

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Solution

The fourth proportional to 1,280,728,387,072.30, 1,921,024,920,909.60 and 420,089,189,996.62 is: 630,111,592,070.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,728,387,072.30 : 1,921,024,920,909.60 = 420,089,189,996.62 : x
  2. Step 2: Convert to fraction form
    1,280,728,387,072.30/1,921,024,920,909.60 = 420,089,189,996.62/x
  3. Step 3: Cross multiply
    1,280,728,387,072.30x = 1,921,024,920,909.60 × 420,089,189,996.62
  4. Step 4: Simplify right side
    1,280,728,387,072.30x = 807,001,802,988,234,936,942,592
  5. Step 5: Solve for x
    x = 807,001,802,988,234,936,942,592/1,280,728,387,072.30
  6. Step 6: Final answer
    x = 630,111,592,070.68

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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.