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Finding the Fourth Proportional to 288.67, 398.47 and 200.60

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Solution

The fourth proportional to 288.67, 398.47 and 200.60 is: 276.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.67 : 398.47 = 200.60 : x
  2. Step 2: Convert to fraction form
    288.67/398.47 = 200.60/x
  3. Step 3: Cross multiply
    288.67x = 398.47 × 200.60
  4. Step 4: Simplify right side
    288.67x = 79,933.08
  5. Step 5: Solve for x
    x = 79,933.08/288.67
  6. Step 6: Final answer
    x = 276.90

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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.