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Finding the Fourth Proportional to 543,665.20, 814,695.90 and 394,220.20

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Solution

The fourth proportional to 543,665.20, 814,695.90 and 394,220.20 is: 590,748.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,665.20 : 814,695.90 = 394,220.20 : x
  2. Step 2: Convert to fraction form
    543,665.20/814,695.90 = 394,220.20/x
  3. Step 3: Cross multiply
    543,665.20x = 814,695.90 × 394,220.20
  4. Step 4: Simplify right side
    543,665.20x = 321,169,580,637.18
  5. Step 5: Solve for x
    x = 321,169,580,637.18/543,665.20
  6. Step 6: Final answer
    x = 590,748.83

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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.