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Finding the Fourth Proportional to 449,990,646.38, 621,011,203.41 and 251,740,314.62

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Solution

The fourth proportional to 449,990,646.38, 621,011,203.41 and 251,740,314.62 is: 347,415,122.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,990,646.38 : 621,011,203.41 = 251,740,314.62 : x
  2. Step 2: Convert to fraction form
    449,990,646.38/621,011,203.41 = 251,740,314.62/x
  3. Step 3: Cross multiply
    449,990,646.38x = 621,011,203.41 × 251,740,314.62
  4. Step 4: Simplify right side
    449,990,646.38x = 156,333,555,728,978,208
  5. Step 5: Solve for x
    x = 156,333,555,728,978,208/449,990,646.38
  6. Step 6: Final answer
    x = 347,415,122.93

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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.