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Finding the Fourth Proportional to 412.05, 617.76 and 265.96

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Solution

The fourth proportional to 412.05, 617.76 and 265.96 is: 398.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.05 : 617.76 = 265.96 : x
  2. Step 2: Convert to fraction form
    412.05/617.76 = 265.96/x
  3. Step 3: Cross multiply
    412.05x = 617.76 × 265.96
  4. Step 4: Simplify right side
    412.05x = 164,299.45
  5. Step 5: Solve for x
    x = 164,299.45/412.05
  6. Step 6: Final answer
    x = 398.74

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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.