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Finding the Fourth Proportional to 449,119.72, 619,638 and 320,078.52

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Solution

The fourth proportional to 449,119.72, 619,638 and 320,078.52 is: 441,603.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,119.72 : 619,638 = 320,078.52 : x
  2. Step 2: Convert to fraction form
    449,119.72/619,638 = 320,078.52/x
  3. Step 3: Cross multiply
    449,119.72x = 619,638 × 320,078.52
  4. Step 4: Simplify right side
    449,119.72x = 198,332,813,975.76
  5. Step 5: Solve for x
    x = 198,332,813,975.76/449,119.72
  6. Step 6: Final answer
    x = 441,603.44

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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.