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Finding the Fourth Proportional to 298.68, 412.20 and 200.64

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Solution

The fourth proportional to 298.68, 412.20 and 200.64 is: 276.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.68 : 412.20 = 200.64 : x
  2. Step 2: Convert to fraction form
    298.68/412.20 = 200.64/x
  3. Step 3: Cross multiply
    298.68x = 412.20 × 200.64
  4. Step 4: Simplify right side
    298.68x = 82,703.81
  5. Step 5: Solve for x
    x = 82,703.81/298.68
  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.