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Finding the Fourth Proportional to 439,615.70, 658,390.20 and 214,269.96

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Solution

The fourth proportional to 439,615.70, 658,390.20 and 214,269.96 is: 320,901.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,615.70 : 658,390.20 = 214,269.96 : x
  2. Step 2: Convert to fraction form
    439,615.70/658,390.20 = 214,269.96/x
  3. Step 3: Cross multiply
    439,615.70x = 658,390.20 × 214,269.96
  4. Step 4: Simplify right side
    439,615.70x = 141,073,240,383.03
  5. Step 5: Solve for x
    x = 141,073,240,383.03/439,615.70
  6. Step 6: Final answer
    x = 320,901.28

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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.