Home / 667,337,900.40-1,001,006,850.60-640,128,121.20

Finding the Fourth Proportional to 667,337,900.40, 1,001,006,850.60 and 640,128,121.20

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Solution

The fourth proportional to 667,337,900.40, 1,001,006,850.60 and 640,128,121.20 is: 960,192,181.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,337,900.40 : 1,001,006,850.60 = 640,128,121.20 : x
  2. Step 2: Convert to fraction form
    667,337,900.40/1,001,006,850.60 = 640,128,121.20/x
  3. Step 3: Cross multiply
    667,337,900.40x = 1,001,006,850.60 × 640,128,121.20
  4. Step 4: Simplify right side
    667,337,900.40x = 640,772,634,582,907,136
  5. Step 5: Solve for x
    x = 640,772,634,582,907,136/667,337,900.40
  6. Step 6: Final answer
    x = 960,192,181.80

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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.