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Finding the Fourth Proportional to 305.08, 457.26 and 131.84

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Solution

The fourth proportional to 305.08, 457.26 and 131.84 is: 197.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.08 : 457.26 = 131.84 : x
  2. Step 2: Convert to fraction form
    305.08/457.26 = 131.84/x
  3. Step 3: Cross multiply
    305.08x = 457.26 × 131.84
  4. Step 4: Simplify right side
    305.08x = 60,285.16
  5. Step 5: Solve for x
    x = 60,285.16/305.08
  6. Step 6: Final answer
    x = 197.60

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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.