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Finding the Fourth Proportional to 343.46, 473.28 and 306.56

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Solution

The fourth proportional to 343.46, 473.28 and 306.56 is: 422.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.46 : 473.28 = 306.56 : x
  2. Step 2: Convert to fraction form
    343.46/473.28 = 306.56/x
  3. Step 3: Cross multiply
    343.46x = 473.28 × 306.56
  4. Step 4: Simplify right side
    343.46x = 145,088.72
  5. Step 5: Solve for x
    x = 145,088.72/343.46
  6. Step 6: Final answer
    x = 422.43

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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.