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Finding the Fourth Proportional to 343.45, 473.80 and 225.62

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Solution

The fourth proportional to 343.45, 473.80 and 225.62 is: 311.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.45 : 473.80 = 225.62 : x
  2. Step 2: Convert to fraction form
    343.45/473.80 = 225.62/x
  3. Step 3: Cross multiply
    343.45x = 473.80 × 225.62
  4. Step 4: Simplify right side
    343.45x = 106,898.76
  5. Step 5: Solve for x
    x = 106,898.76/343.45
  6. Step 6: Final answer
    x = 311.25

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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.