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Finding the Fourth Proportional to 283.75, 391.80 and 189.32

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Solution

The fourth proportional to 283.75, 391.80 and 189.32 is: 261.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.75 : 391.80 = 189.32 : x
  2. Step 2: Convert to fraction form
    283.75/391.80 = 189.32/x
  3. Step 3: Cross multiply
    283.75x = 391.80 × 189.32
  4. Step 4: Simplify right side
    283.75x = 74,174.33
  5. Step 5: Solve for x
    x = 74,174.33/283.75
  6. Step 6: Final answer
    x = 261.40

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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.