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Finding the Fourth Proportional to 343.97, 474.69 and 188.72

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Solution

The fourth proportional to 343.97, 474.69 and 188.72 is: 260.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.97 : 474.69 = 188.72 : x
  2. Step 2: Convert to fraction form
    343.97/474.69 = 188.72/x
  3. Step 3: Cross multiply
    343.97x = 474.69 × 188.72
  4. Step 4: Simplify right side
    343.97x = 89,581.12
  5. Step 5: Solve for x
    x = 89,581.12/343.97
  6. Step 6: Final answer
    x = 260.44

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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.