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Finding the Fourth Proportional to 423.98, 636.06 and 131.51

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Solution

The fourth proportional to 423.98, 636.06 and 131.51 is: 197.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.98 : 636.06 = 131.51 : x
  2. Step 2: Convert to fraction form
    423.98/636.06 = 131.51/x
  3. Step 3: Cross multiply
    423.98x = 636.06 × 131.51
  4. Step 4: Simplify right side
    423.98x = 83,645.56
  5. Step 5: Solve for x
    x = 83,645.56/423.98
  6. Step 6: Final answer
    x = 197.29

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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.