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Finding the Fourth Proportional to 347.60, 520.80 and 225.80

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Solution

The fourth proportional to 347.60, 520.80 and 225.80 is: 338.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.60 : 520.80 = 225.80 : x
  2. Step 2: Convert to fraction form
    347.60/520.80 = 225.80/x
  3. Step 3: Cross multiply
    347.60x = 520.80 × 225.80
  4. Step 4: Simplify right side
    347.60x = 117,596.64
  5. Step 5: Solve for x
    x = 117,596.64/347.60
  6. Step 6: Final answer
    x = 338.31

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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.