Home / 425,981,179.20-638,971,768.80-380,064,676.80

Finding the Fourth Proportional to 425,981,179.20, 638,971,768.80 and 380,064,676.80

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Solution

The fourth proportional to 425,981,179.20, 638,971,768.80 and 380,064,676.80 is: 570,097,015.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,981,179.20 : 638,971,768.80 = 380,064,676.80 : x
  2. Step 2: Convert to fraction form
    425,981,179.20/638,971,768.80 = 380,064,676.80/x
  3. Step 3: Cross multiply
    425,981,179.20x = 638,971,768.80 × 380,064,676.80
  4. Step 4: Simplify right side
    425,981,179.20x = 242,850,598,793,296,320
  5. Step 5: Solve for x
    x = 242,850,598,793,296,320/425,981,179.20
  6. Step 6: Final answer
    x = 570,097,015.20

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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.