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Finding the Fourth Proportional to 266.37, 398.71 and 192.12

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Solution

The fourth proportional to 266.37, 398.71 and 192.12 is: 287.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.37 : 398.71 = 192.12 : x
  2. Step 2: Convert to fraction form
    266.37/398.71 = 192.12/x
  3. Step 3: Cross multiply
    266.37x = 398.71 × 192.12
  4. Step 4: Simplify right side
    266.37x = 76,600.17
  5. Step 5: Solve for x
    x = 76,600.17/266.37
  6. Step 6: Final answer
    x = 287.57

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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.