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Finding the Fourth Proportional to 283.81, 425.45 and 127.55

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Solution

The fourth proportional to 283.81, 425.45 and 127.55 is: 191.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.81 : 425.45 = 127.55 : x
  2. Step 2: Convert to fraction form
    283.81/425.45 = 127.55/x
  3. Step 3: Cross multiply
    283.81x = 425.45 × 127.55
  4. Step 4: Simplify right side
    283.81x = 54,266.15
  5. Step 5: Solve for x
    x = 54,266.15/283.81
  6. Step 6: Final answer
    x = 191.21

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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.