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Finding the Fourth Proportional to 266.34, 397.87 and 192.59

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Solution

The fourth proportional to 266.34, 397.87 and 192.59 is: 287.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.34 : 397.87 = 192.59 : x
  2. Step 2: Convert to fraction form
    266.34/397.87 = 192.59/x
  3. Step 3: Cross multiply
    266.34x = 397.87 × 192.59
  4. Step 4: Simplify right side
    266.34x = 76,623.79
  5. Step 5: Solve for x
    x = 76,623.79/266.34
  6. Step 6: Final answer
    x = 287.69

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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.