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Finding the Fourth Proportional to 322.62, 444.78 and 212.05

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Solution

The fourth proportional to 322.62, 444.78 and 212.05 is: 292.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.62 : 444.78 = 212.05 : x
  2. Step 2: Convert to fraction form
    322.62/444.78 = 212.05/x
  3. Step 3: Cross multiply
    322.62x = 444.78 × 212.05
  4. Step 4: Simplify right side
    322.62x = 94,316.71
  5. Step 5: Solve for x
    x = 94,316.71/322.62
  6. Step 6: Final answer
    x = 292.35

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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.