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Finding the Fourth Proportional to 322.78, 444.98 and 212.08

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Solution

The fourth proportional to 322.78, 444.98 and 212.08 is: 292.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.78 : 444.98 = 212.08 : x
  2. Step 2: Convert to fraction form
    322.78/444.98 = 212.08/x
  3. Step 3: Cross multiply
    322.78x = 444.98 × 212.08
  4. Step 4: Simplify right side
    322.78x = 94,371.36
  5. Step 5: Solve for x
    x = 94,371.36/322.78
  6. Step 6: Final answer
    x = 292.37

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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.