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Finding the Fourth Proportional to 283.49, 390.66 and 213.62

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Solution

The fourth proportional to 283.49, 390.66 and 213.62 is: 294.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.49 : 390.66 = 213.62 : x
  2. Step 2: Convert to fraction form
    283.49/390.66 = 213.62/x
  3. Step 3: Cross multiply
    283.49x = 390.66 × 213.62
  4. Step 4: Simplify right side
    283.49x = 83,452.79
  5. Step 5: Solve for x
    x = 83,452.79/283.49
  6. Step 6: Final answer
    x = 294.38

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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.