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Finding the Fourth Proportional to 283.66, 425.50 and 129.55

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Solution

The fourth proportional to 283.66, 425.50 and 129.55 is: 194.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.66 : 425.50 = 129.55 : x
  2. Step 2: Convert to fraction form
    283.66/425.50 = 129.55/x
  3. Step 3: Cross multiply
    283.66x = 425.50 × 129.55
  4. Step 4: Simplify right side
    283.66x = 55,122.84
  5. Step 5: Solve for x
    x = 55,122.84/283.66
  6. Step 6: Final answer
    x = 194.32

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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.