Home / 780,275,215.20-1,170,412,822.80-320,543,320.80

Finding the Fourth Proportional to 780,275,215.20, 1,170,412,822.80 and 320,543,320.80

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Solution

The fourth proportional to 780,275,215.20, 1,170,412,822.80 and 320,543,320.80 is: 480,814,981.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,275,215.20 : 1,170,412,822.80 = 320,543,320.80 : x
  2. Step 2: Convert to fraction form
    780,275,215.20/1,170,412,822.80 = 320,543,320.80/x
  3. Step 3: Cross multiply
    780,275,215.20x = 1,170,412,822.80 × 320,543,320.80
  4. Step 4: Simplify right side
    780,275,215.20x = 375,168,012,927,213,952
  5. Step 5: Solve for x
    x = 375,168,012,927,213,952/780,275,215.20
  6. Step 6: Final answer
    x = 480,814,981.20

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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.