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Finding the Fourth Proportional to 341.11, 470.72 and 208.55

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Solution

The fourth proportional to 341.11, 470.72 and 208.55 is: 287.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.11 : 470.72 = 208.55 : x
  2. Step 2: Convert to fraction form
    341.11/470.72 = 208.55/x
  3. Step 3: Cross multiply
    341.11x = 470.72 × 208.55
  4. Step 4: Simplify right side
    341.11x = 98,168.30
  5. Step 5: Solve for x
    x = 98,168.30/341.11
  6. Step 6: Final answer
    x = 287.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.