Home / 1,280,728,386,540.70-1,921,024,920,112.30-420,089,189,465.16

Finding the Fourth Proportional to 1,280,728,386,540.70, 1,921,024,920,112.30 and 420,089,189,465.16

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Solution

The fourth proportional to 1,280,728,386,540.70, 1,921,024,920,112.30 and 420,089,189,465.16 is: 630,111,591,273.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,728,386,540.70 : 1,921,024,920,112.30 = 420,089,189,465.16 : x
  2. Step 2: Convert to fraction form
    1,280,728,386,540.70/1,921,024,920,112.30 = 420,089,189,465.16/x
  3. Step 3: Cross multiply
    1,280,728,386,540.70x = 1,921,024,920,112.30 × 420,089,189,465.16
  4. Step 4: Simplify right side
    1,280,728,386,540.70x = 807,001,801,632,349,866,164,224
  5. Step 5: Solve for x
    x = 807,001,801,632,349,866,164,224/1,280,728,386,540.70
  6. Step 6: Final answer
    x = 630,111,591,273.54

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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.