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Finding the Fourth Proportional to 301.15, 451.62 and 84.68

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Solution

The fourth proportional to 301.15, 451.62 and 84.68 is: 126.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.15 : 451.62 = 84.68 : x
  2. Step 2: Convert to fraction form
    301.15/451.62 = 84.68/x
  3. Step 3: Cross multiply
    301.15x = 451.62 × 84.68
  4. Step 4: Simplify right side
    301.15x = 38,242.93
  5. Step 5: Solve for x
    x = 38,242.93/301.15
  6. Step 6: Final answer
    x = 126.99

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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.