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Finding the Fourth Proportional to 347.99, 480.20 and 274.49

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Solution

The fourth proportional to 347.99, 480.20 and 274.49 is: 378.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.99 : 480.20 = 274.49 : x
  2. Step 2: Convert to fraction form
    347.99/480.20 = 274.49/x
  3. Step 3: Cross multiply
    347.99x = 480.20 × 274.49
  4. Step 4: Simplify right side
    347.99x = 131,806.32
  5. Step 5: Solve for x
    x = 131,806.32/347.99
  6. Step 6: Final answer
    x = 378.77

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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.