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Finding the Fourth Proportional to 261.73, 393.45 and 242.56

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Solution

The fourth proportional to 261.73, 393.45 and 242.56 is: 364.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.73 : 393.45 = 242.56 : x
  2. Step 2: Convert to fraction form
    261.73/393.45 = 242.56/x
  3. Step 3: Cross multiply
    261.73x = 393.45 × 242.56
  4. Step 4: Simplify right side
    261.73x = 95,435.23
  5. Step 5: Solve for x
    x = 95,435.23/261.73
  6. Step 6: Final answer
    x = 364.63

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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.