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Finding the Fourth Proportional to 449,407.36, 619,329.54 and 321,861.52

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Solution

The fourth proportional to 449,407.36, 619,329.54 and 321,861.52 is: 443,558.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,407.36 : 619,329.54 = 321,861.52 : x
  2. Step 2: Convert to fraction form
    449,407.36/619,329.54 = 321,861.52/x
  3. Step 3: Cross multiply
    449,407.36x = 619,329.54 × 321,861.52
  4. Step 4: Simplify right side
    449,407.36x = 199,338,347,125.30
  5. Step 5: Solve for x
    x = 199,338,347,125.30/449,407.36
  6. Step 6: Final answer
    x = 443,558.26

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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.