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Finding the Fourth Proportional to 283.79, 391.75 and 165.72

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Solution

The fourth proportional to 283.79, 391.75 and 165.72 is: 228.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.79 : 391.75 = 165.72 : x
  2. Step 2: Convert to fraction form
    283.79/391.75 = 165.72/x
  3. Step 3: Cross multiply
    283.79x = 391.75 × 165.72
  4. Step 4: Simplify right side
    283.79x = 64,919.83
  5. Step 5: Solve for x
    x = 64,919.83/283.79
  6. Step 6: Final answer
    x = 228.76

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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.