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Finding the Fourth Proportional to 280.76, 422.63 and 200.16

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Solution

The fourth proportional to 280.76, 422.63 and 200.16 is: 301.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.76 : 422.63 = 200.16 : x
  2. Step 2: Convert to fraction form
    280.76/422.63 = 200.16/x
  3. Step 3: Cross multiply
    280.76x = 422.63 × 200.16
  4. Step 4: Simplify right side
    280.76x = 84,593.62
  5. Step 5: Solve for x
    x = 84,593.62/280.76
  6. Step 6: Final answer
    x = 301.30

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.