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Finding the Fourth Proportional to 329.87, 493.49 and 280.87

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Solution

The fourth proportional to 329.87, 493.49 and 280.87 is: 420.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.87 : 493.49 = 280.87 : x
  2. Step 2: Convert to fraction form
    329.87/493.49 = 280.87/x
  3. Step 3: Cross multiply
    329.87x = 493.49 × 280.87
  4. Step 4: Simplify right side
    329.87x = 138,606.00
  5. Step 5: Solve for x
    x = 138,606.00/329.87
  6. Step 6: Final answer
    x = 420.18

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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.