Home / 395,306,020,451.55-545,484,189,690.69-221,698,207,887.60

Finding the Fourth Proportional to 395,306,020,451.55, 545,484,189,690.69 and 221,698,207,887.60

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Solution

The fourth proportional to 395,306,020,451.55, 545,484,189,690.69 and 221,698,207,887.60 is: 305,922,148,990.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,306,020,451.55 : 545,484,189,690.69 = 221,698,207,887.60 : x
  2. Step 2: Convert to fraction form
    395,306,020,451.55/545,484,189,690.69 = 221,698,207,887.60/x
  3. Step 3: Cross multiply
    395,306,020,451.55x = 545,484,189,690.69 × 221,698,207,887.60
  4. Step 4: Simplify right side
    395,306,020,451.55x = 120,932,867,285,445,634,949,120
  5. Step 5: Solve for x
    x = 120,932,867,285,445,634,949,120/395,306,020,451.55
  6. Step 6: Final answer
    x = 305,922,148,990.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.