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Finding the Fourth Proportional to 312.73, 468.79 and 266.56

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Solution

The fourth proportional to 312.73, 468.79 and 266.56 is: 399.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.73 : 468.79 = 266.56 : x
  2. Step 2: Convert to fraction form
    312.73/468.79 = 266.56/x
  3. Step 3: Cross multiply
    312.73x = 468.79 × 266.56
  4. Step 4: Simplify right side
    312.73x = 124,960.66
  5. Step 5: Solve for x
    x = 124,960.66/312.73
  6. Step 6: Final answer
    x = 399.58

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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.