Home / 1,280,728,386,845.90-1,921,024,920,570-420,089,189,770.20

Finding the Fourth Proportional to 1,280,728,386,845.90, 1,921,024,920,570 and 420,089,189,770.20

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Solution

The fourth proportional to 1,280,728,386,845.90, 1,921,024,920,570 and 420,089,189,770.20 is: 630,111,591,731.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,728,386,845.90 : 1,921,024,920,570 = 420,089,189,770.20 : x
  2. Step 2: Convert to fraction form
    1,280,728,386,845.90/1,921,024,920,570 = 420,089,189,770.20/x
  3. Step 3: Cross multiply
    1,280,728,386,845.90x = 1,921,024,920,570 × 420,089,189,770.20
  4. Step 4: Simplify right side
    1,280,728,386,845.90x = 807,001,802,410,614,180,544,512
  5. Step 5: Solve for x
    x = 807,001,802,410,614,180,544,512/1,280,728,386,845.90
  6. Step 6: Final answer
    x = 630,111,591,731.05

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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.