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Finding the Fourth Proportional to 266.16, 396.42 and 262.95

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Solution

The fourth proportional to 266.16, 396.42 and 262.95 is: 391.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.16 : 396.42 = 262.95 : x
  2. Step 2: Convert to fraction form
    266.16/396.42 = 262.95/x
  3. Step 3: Cross multiply
    266.16x = 396.42 × 262.95
  4. Step 4: Simplify right side
    266.16x = 104,238.64
  5. Step 5: Solve for x
    x = 104,238.64/266.16
  6. Step 6: Final answer
    x = 391.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.