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Finding the Fourth Proportional to 343.22, 473.57 and 212.18

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Solution

The fourth proportional to 343.22, 473.57 and 212.18 is: 292.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.22 : 473.57 = 212.18 : x
  2. Step 2: Convert to fraction form
    343.22/473.57 = 212.18/x
  3. Step 3: Cross multiply
    343.22x = 473.57 × 212.18
  4. Step 4: Simplify right side
    343.22x = 100,482.08
  5. Step 5: Solve for x
    x = 100,482.08/343.22
  6. Step 6: Final answer
    x = 292.76

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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.