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Finding the Fourth Proportional to 285.88, 394.02 and 212.44

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Solution

The fourth proportional to 285.88, 394.02 and 212.44 is: 292.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.88 : 394.02 = 212.44 : x
  2. Step 2: Convert to fraction form
    285.88/394.02 = 212.44/x
  3. Step 3: Cross multiply
    285.88x = 394.02 × 212.44
  4. Step 4: Simplify right side
    285.88x = 83,705.61
  5. Step 5: Solve for x
    x = 83,705.61/285.88
  6. Step 6: Final answer
    x = 292.80

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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.