Home / 1,280,728,386,846.90-1,921,024,920,571.50-420,089,189,771.20

Finding the Fourth Proportional to 1,280,728,386,846.90, 1,921,024,920,571.50 and 420,089,189,771.20

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Solution

The fourth proportional to 1,280,728,386,846.90, 1,921,024,920,571.50 and 420,089,189,771.20 is: 630,111,591,732.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,728,386,846.90 : 1,921,024,920,571.50 = 420,089,189,771.20 : x
  2. Step 2: Convert to fraction form
    1,280,728,386,846.90/1,921,024,920,571.50 = 420,089,189,771.20/x
  3. Step 3: Cross multiply
    1,280,728,386,846.90x = 1,921,024,920,571.50 × 420,089,189,771.20
  4. Step 4: Simplify right side
    1,280,728,386,846.90x = 807,001,802,413,165,256,900,608
  5. Step 5: Solve for x
    x = 807,001,802,413,165,256,900,608/1,280,728,386,846.90
  6. Step 6: Final answer
    x = 630,111,591,732.55

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Double scale
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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.