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Finding the Fourth Proportional to 305.61, 458.08 and 122.91

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Solution

The fourth proportional to 305.61, 458.08 and 122.91 is: 184.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.61 : 458.08 = 122.91 : x
  2. Step 2: Convert to fraction form
    305.61/458.08 = 122.91/x
  3. Step 3: Cross multiply
    305.61x = 458.08 × 122.91
  4. Step 4: Simplify right side
    305.61x = 56,302.61
  5. Step 5: Solve for x
    x = 56,302.61/305.61
  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.