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Finding the Fourth Proportional to 265.12, 396.84 and 190.87

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Solution

The fourth proportional to 265.12, 396.84 and 190.87 is: 285.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.12 : 396.84 = 190.87 : x
  2. Step 2: Convert to fraction form
    265.12/396.84 = 190.87/x
  3. Step 3: Cross multiply
    265.12x = 396.84 × 190.87
  4. Step 4: Simplify right side
    265.12x = 75,744.85
  5. Step 5: Solve for x
    x = 75,744.85/265.12
  6. Step 6: Final answer
    x = 285.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.