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Finding the Fourth Proportional to 343.64, 474.21 and 188.39

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Solution

The fourth proportional to 343.64, 474.21 and 188.39 is: 259.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.64 : 474.21 = 188.39 : x
  2. Step 2: Convert to fraction form
    343.64/474.21 = 188.39/x
  3. Step 3: Cross multiply
    343.64x = 474.21 × 188.39
  4. Step 4: Simplify right side
    343.64x = 89,336.42
  5. Step 5: Solve for x
    x = 89,336.42/343.64
  6. Step 6: Final answer
    x = 259.97

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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.