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Finding the Fourth Proportional to 283.69, 425.53 and 91.31

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Solution

The fourth proportional to 283.69, 425.53 and 91.31 is: 136.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.69 : 425.53 = 91.31 : x
  2. Step 2: Convert to fraction form
    283.69/425.53 = 91.31/x
  3. Step 3: Cross multiply
    283.69x = 425.53 × 91.31
  4. Step 4: Simplify right side
    283.69x = 38,855.14
  5. Step 5: Solve for x
    x = 38,855.14/283.69
  6. Step 6: Final answer
    x = 136.96

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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.