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Finding the Fourth Proportional to 283.28, 390.92 and 158.96

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Solution

The fourth proportional to 283.28, 390.92 and 158.96 is: 219.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.28 : 390.92 = 158.96 : x
  2. Step 2: Convert to fraction form
    283.28/390.92 = 158.96/x
  3. Step 3: Cross multiply
    283.28x = 390.92 × 158.96
  4. Step 4: Simplify right side
    283.28x = 62,142.02
  5. Step 5: Solve for x
    x = 62,142.02/283.28
  6. Step 6: Final answer
    x = 219.37

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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.