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Finding the Fourth Proportional to 280.60, 387.33 and 200.94

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Solution

The fourth proportional to 280.60, 387.33 and 200.94 is: 277.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.60 : 387.33 = 200.94 : x
  2. Step 2: Convert to fraction form
    280.60/387.33 = 200.94/x
  3. Step 3: Cross multiply
    280.60x = 387.33 × 200.94
  4. Step 4: Simplify right side
    280.60x = 77,830.09
  5. Step 5: Solve for x
    x = 77,830.09/280.60
  6. Step 6: Final answer
    x = 277.37

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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.