Home / 780,275,221.20-1,170,412,831.80-320,543,326.80

Finding the Fourth Proportional to 780,275,221.20, 1,170,412,831.80 and 320,543,326.80

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Solution

The fourth proportional to 780,275,221.20, 1,170,412,831.80 and 320,543,326.80 is: 480,814,990.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,275,221.20 : 1,170,412,831.80 = 320,543,326.80 : x
  2. Step 2: Convert to fraction form
    780,275,221.20/1,170,412,831.80 = 320,543,326.80/x
  3. Step 3: Cross multiply
    780,275,221.20x = 1,170,412,831.80 × 320,543,326.80
  4. Step 4: Simplify right side
    780,275,221.20x = 375,168,022,834,580,800
  5. Step 5: Solve for x
    x = 375,168,022,834,580,800/780,275,221.20
  6. Step 6: Final answer
    x = 480,814,990.20

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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.