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Finding the Fourth Proportional to 347,805.20, 520,930.20 and 268,662.80

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Solution

The fourth proportional to 347,805.20, 520,930.20 and 268,662.80 is: 402,393.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,805.20 : 520,930.20 = 268,662.80 : x
  2. Step 2: Convert to fraction form
    347,805.20/520,930.20 = 268,662.80/x
  3. Step 3: Cross multiply
    347,805.20x = 520,930.20 × 268,662.80
  4. Step 4: Simplify right side
    347,805.20x = 139,954,566,136.56
  5. Step 5: Solve for x
    x = 139,954,566,136.56/347,805.20
  6. Step 6: Final answer
    x = 402,393.54

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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.