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Finding the Fourth Proportional to 261.14, 393.54 and 248.79

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Solution

The fourth proportional to 261.14, 393.54 and 248.79 is: 374.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.14 : 393.54 = 248.79 : x
  2. Step 2: Convert to fraction form
    261.14/393.54 = 248.79/x
  3. Step 3: Cross multiply
    261.14x = 393.54 × 248.79
  4. Step 4: Simplify right side
    261.14x = 97,908.82
  5. Step 5: Solve for x
    x = 97,908.82/261.14
  6. Step 6: Final answer
    x = 374.92

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.