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Finding the Fourth Proportional to 322.87, 445.63 and 212.35

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Solution

The fourth proportional to 322.87, 445.63 and 212.35 is: 293.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.87 : 445.63 = 212.35 : x
  2. Step 2: Convert to fraction form
    322.87/445.63 = 212.35/x
  3. Step 3: Cross multiply
    322.87x = 445.63 × 212.35
  4. Step 4: Simplify right side
    322.87x = 94,629.58
  5. Step 5: Solve for x
    x = 94,629.58/322.87
  6. Step 6: Final answer
    x = 293.09

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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.