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Finding the Fourth Proportional to 341.79, 512.28 and 261.06

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Solution

The fourth proportional to 341.79, 512.28 and 261.06 is: 391.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.79 : 512.28 = 261.06 : x
  2. Step 2: Convert to fraction form
    341.79/512.28 = 261.06/x
  3. Step 3: Cross multiply
    341.79x = 512.28 × 261.06
  4. Step 4: Simplify right side
    341.79x = 133,735.82
  5. Step 5: Solve for x
    x = 133,735.82/341.79
  6. Step 6: Final answer
    x = 391.28

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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.