Home / 1,405,451,047.15-1,939,522,628.91-778,959,921.61

Finding the Fourth Proportional to 1,405,451,047.15, 1,939,522,628.91 and 778,959,921.61

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Solution

The fourth proportional to 1,405,451,047.15, 1,939,522,628.91 and 778,959,921.61 is: 1,074,964,793.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405,451,047.15 : 1,939,522,628.91 = 778,959,921.61 : x
  2. Step 2: Convert to fraction form
    1,405,451,047.15/1,939,522,628.91 = 778,959,921.61/x
  3. Step 3: Cross multiply
    1,405,451,047.15x = 1,939,522,628.91 × 778,959,921.61
  4. Step 4: Simplify right side
    1,405,451,047.15x = 1,510,810,394,976,554,752
  5. Step 5: Solve for x
    x = 1,510,810,394,976,554,752/1,405,451,047.15
  6. Step 6: Final answer
    x = 1,074,964,793.72

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1.5x scale

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.