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Finding the Fourth Proportional to 266.22, 396.77 and 260.82

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Solution

The fourth proportional to 266.22, 396.77 and 260.82 is: 388.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.22 : 396.77 = 260.82 : x
  2. Step 2: Convert to fraction form
    266.22/396.77 = 260.82/x
  3. Step 3: Cross multiply
    266.22x = 396.77 × 260.82
  4. Step 4: Simplify right side
    266.22x = 103,484.25
  5. Step 5: Solve for x
    x = 103,484.25/266.22
  6. Step 6: Final answer
    x = 388.72

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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.