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Finding the Fourth Proportional to 283.40, 391.32 and 230.95

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Solution

The fourth proportional to 283.40, 391.32 and 230.95 is: 318.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.40 : 391.32 = 230.95 : x
  2. Step 2: Convert to fraction form
    283.40/391.32 = 230.95/x
  3. Step 3: Cross multiply
    283.40x = 391.32 × 230.95
  4. Step 4: Simplify right side
    283.40x = 90,372.24
  5. Step 5: Solve for x
    x = 90,372.24/283.40
  6. Step 6: Final answer
    x = 318.89

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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.