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Finding the Fourth Proportional to 438,548.56, 657,293.10 and 213,571.86

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Solution

The fourth proportional to 438,548.56, 657,293.10 and 213,571.86 is: 320,099.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,548.56 : 657,293.10 = 213,571.86 : x
  2. Step 2: Convert to fraction form
    438,548.56/657,293.10 = 213,571.86/x
  3. Step 3: Cross multiply
    438,548.56x = 657,293.10 × 213,571.86
  4. Step 4: Simplify right side
    438,548.56x = 140,379,309,932.17
  5. Step 5: Solve for x
    x = 140,379,309,932.17/438,548.56
  6. Step 6: Final answer
    x = 320,099.81

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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.