Home / 395,137,644.56-545,289,949.44-221,297,388.56

Finding the Fourth Proportional to 395,137,644.56, 545,289,949.44 and 221,297,388.56

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Solution

The fourth proportional to 395,137,644.56, 545,289,949.44 and 221,297,388.56 is: 305,390,396.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,137,644.56 : 545,289,949.44 = 221,297,388.56 : x
  2. Step 2: Convert to fraction form
    395,137,644.56/545,289,949.44 = 221,297,388.56/x
  3. Step 3: Cross multiply
    395,137,644.56x = 545,289,949.44 × 221,297,388.56
  4. Step 4: Simplify right side
    395,137,644.56x = 120,671,241,819,086,448
  5. Step 5: Solve for x
    x = 120,671,241,819,086,448/395,137,644.56
  6. Step 6: Final answer
    x = 305,390,396.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.