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Finding the Fourth Proportional to 305.15, 457.75 and 131.82

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Solution

The fourth proportional to 305.15, 457.75 and 131.82 is: 197.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.15 : 457.75 = 131.82 : x
  2. Step 2: Convert to fraction form
    305.15/457.75 = 131.82/x
  3. Step 3: Cross multiply
    305.15x = 457.75 × 131.82
  4. Step 4: Simplify right side
    305.15x = 60,338.31
  5. Step 5: Solve for x
    x = 60,338.31/305.15
  6. Step 6: Final answer
    x = 197.74

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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.