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Finding the Fourth Proportional to 297.15, 409.82 and 262.21

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Solution

The fourth proportional to 297.15, 409.82 and 262.21 is: 361.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.15 : 409.82 = 262.21 : x
  2. Step 2: Convert to fraction form
    297.15/409.82 = 262.21/x
  3. Step 3: Cross multiply
    297.15x = 409.82 × 262.21
  4. Step 4: Simplify right side
    297.15x = 107,457.55
  5. Step 5: Solve for x
    x = 107,457.55/297.15
  6. Step 6: Final answer
    x = 361.63

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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.