Home / 412,128,820.80-618,193,231.20-409,259,039.40

Finding the Fourth Proportional to 412,128,820.80, 618,193,231.20 and 409,259,039.40

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Solution

The fourth proportional to 412,128,820.80, 618,193,231.20 and 409,259,039.40 is: 613,888,559.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,128,820.80 : 618,193,231.20 = 409,259,039.40 : x
  2. Step 2: Convert to fraction form
    412,128,820.80/618,193,231.20 = 409,259,039.40/x
  3. Step 3: Cross multiply
    412,128,820.80x = 618,193,231.20 × 409,259,039.40
  4. Step 4: Simplify right side
    412,128,820.80x = 253,001,167,964,494,112
  5. Step 5: Solve for x
    x = 253,001,167,964,494,112/412,128,820.80
  6. Step 6: Final answer
    x = 613,888,559.10

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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.