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Finding the Fourth Proportional to 321,456.44, 443,520.05 and 253,262.03

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Solution

The fourth proportional to 321,456.44, 443,520.05 and 253,262.03 is: 349,430.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,456.44 : 443,520.05 = 253,262.03 : x
  2. Step 2: Convert to fraction form
    321,456.44/443,520.05 = 253,262.03/x
  3. Step 3: Cross multiply
    321,456.44x = 443,520.05 × 253,262.03
  4. Step 4: Simplify right side
    321,456.44x = 112,326,784,724.79
  5. Step 5: Solve for x
    x = 112,326,784,724.79/321,456.44
  6. Step 6: Final answer
    x = 349,430.82

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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.