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Finding the Fourth Proportional to 305.56, 458.19 and 122.81

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Solution

The fourth proportional to 305.56, 458.19 and 122.81 is: 184.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.56 : 458.19 = 122.81 : x
  2. Step 2: Convert to fraction form
    305.56/458.19 = 122.81/x
  3. Step 3: Cross multiply
    305.56x = 458.19 × 122.81
  4. Step 4: Simplify right side
    305.56x = 56,268.02
  5. Step 5: Solve for x
    x = 56,268.02/305.56
  6. Step 6: Final answer
    x = 184.15

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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.