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Finding the Fourth Proportional to 304.57, 456.87 and 121.86

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Solution

The fourth proportional to 304.57, 456.87 and 121.86 is: 182.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.57 : 456.87 = 121.86 : x
  2. Step 2: Convert to fraction form
    304.57/456.87 = 121.86/x
  3. Step 3: Cross multiply
    304.57x = 456.87 × 121.86
  4. Step 4: Simplify right side
    304.57x = 55,674.64
  5. Step 5: Solve for x
    x = 55,674.64/304.57
  6. Step 6: Final answer
    x = 182.80

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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.