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Finding the Fourth Proportional to 613,103,610.80, 919,655,416.20 and 395,425,377.20

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Solution

The fourth proportional to 613,103,610.80, 919,655,416.20 and 395,425,377.20 is: 593,138,065.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,103,610.80 : 919,655,416.20 = 395,425,377.20 : x
  2. Step 2: Convert to fraction form
    613,103,610.80/919,655,416.20 = 395,425,377.20/x
  3. Step 3: Cross multiply
    613,103,610.80x = 919,655,416.20 × 395,425,377.20
  4. Step 4: Simplify right side
    613,103,610.80x = 363,655,089,844,907,968
  5. Step 5: Solve for x
    x = 363,655,089,844,907,968/613,103,610.80
  6. Step 6: Final answer
    x = 593,138,065.80

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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.