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Finding the Fourth Proportional to 421,659,466.98, 581,858,293.77 and 256,628,796.90

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Solution

The fourth proportional to 421,659,466.98, 581,858,293.77 and 256,628,796.90 is: 354,128,403.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,659,466.98 : 581,858,293.77 = 256,628,796.90 : x
  2. Step 2: Convert to fraction form
    421,659,466.98/581,858,293.77 = 256,628,796.90/x
  3. Step 3: Cross multiply
    421,659,466.98x = 581,858,293.77 × 256,628,796.90
  4. Step 4: Simplify right side
    421,659,466.98x = 149,321,593,896,481,856
  5. Step 5: Solve for x
    x = 149,321,593,896,481,856/421,659,466.98
  6. Step 6: Final answer
    x = 354,128,403.58

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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.