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Finding the Fourth Proportional to 283.87, 425.90 and 121.56

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Solution

The fourth proportional to 283.87, 425.90 and 121.56 is: 182.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.87 : 425.90 = 121.56 : x
  2. Step 2: Convert to fraction form
    283.87/425.90 = 121.56/x
  3. Step 3: Cross multiply
    283.87x = 425.90 × 121.56
  4. Step 4: Simplify right side
    283.87x = 51,772.40
  5. Step 5: Solve for x
    x = 51,772.40/283.87
  6. Step 6: Final answer
    x = 182.38

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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.