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Finding the Fourth Proportional to 305.58, 458.06 and 122.90

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Solution

The fourth proportional to 305.58, 458.06 and 122.90 is: 184.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.58 : 458.06 = 122.90 : x
  2. Step 2: Convert to fraction form
    305.58/458.06 = 122.90/x
  3. Step 3: Cross multiply
    305.58x = 458.06 × 122.90
  4. Step 4: Simplify right side
    305.58x = 56,295.57
  5. Step 5: Solve for x
    x = 56,295.57/305.58
  6. Step 6: Final answer
    x = 184.23

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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.